I just realised from the comments that the pressure chamber should be standing up so that we could fit the whole bottle in :D I think we might need to revisit this like that and also try with glass bottle and pure water if that gives more explody results?
Yeah... and I think if the bottle isn't completely full then you could have a larger surface area inside the bottle... on the other hand, it may not work as well when adding Mentos if it isn't full (like you said)...
There are ingredients in Coke that act as surfactants - that is, they are like soap - that trap the bubbles in a foam. Diet coke has more effective surfactants than regular coke does.
Coke zero and diet coke don't have the same ingredients, at least in the UK, Diet Coke has always seemed like it performed the best when I have done the mentos thing it for the kids
I think you're going to lose a lot of CO2 just by pouring the Coca-Cola into the bottle again. If you could have the cylinder standing, you might be able to fit an open bottle into the chamber. That doesn't solve the issue of surface area for the CO2 to be dissolved into the liquid, because you end up with a much smaller surface area to do it. The chamber you have might not be able to do it, but one solution might be to have a small, battery powered air pump and a small hose inserted into the Coca-Cola, bubbling the cylinder's internal atmosphere through the liquid. That way, when you're ready to do the Mentos test, "all" you need to do is remove the top and pump, and you just drop the Mentos into the bottle.
We lost way more when lowering the pressure on the chamber the liquid was boiling like crazy there. While pouring it to the bottle I didn't see much of anything happening. But I think if we just lift the thing up we can have bottle in there as whole. Not sure why I get the idea now :D We could also try with just water if that would work better.
@@Beyondthepress the previous glass beaker had no bubbles nucleating because it was so smooth. The plastic containers were bubbling like crazy even with the normal coke.
The CO2 would react with water to make bicarbonate which is baking soda. This would react with the acetic acid and they would neutralize. The. You throw in sodium bicarbonate, e.g. baking soda, and the baking soda would dissolve peacefully until it reached saturation.
@@EricDKaufman uhm actually ☝️🤓 the CO2 reacts with water to create carbonic acid so it will just make a mix of acid, acetic acid (vinegar) and carbonic acid (CO2 dissolved in water) ok... maybe it will release some CO2 when you mix it, but it wont neutralize the vinegar, because carbonic acid and sodium bicarbonate (baking soda) is not the same
@@EricDKaufman You need to brush up your chemistry lessons. Baking soda, or sodium bicarbonate, is a base. Adding bicarbonate to carbonated water will cause the bicarbonate to react with the carbonic acid, releasing more CO2 in the process, leaving sodium carbonyle salt behind.
For O-rings, Viton or Fluorosilicone might be good options. I think Viton generally resists acids better, but Fluorosilicone holds up better at very low temperatures.
Glass bottle in the chamber standing vertically will absolutely work the best. Also let the chamber depressurize slower. You loose carbonation to the plastic containers causing nucleation points, and the quick pressure change will agitate the surface of the liquid. Also you'll loose a lot transferring if its fully carbonated already, so you want to do it in the bottle from the start by putting the chamber on its side
Diet Coke definitely reacts more strongly than regular coke or even Coke Zero. I think Diet Coke is called Coke Lite in Europe, or at least it was like that in the UK, Austria and Hungary last time I was there.
Liquid CO2 is routinely used as a solvent, in particular to extract vegetable oils. It's advantages are : It don't react with the oils and you can remove all of it. Repeat this, but with the pressure chamber set vertically so that you can place the whole bottle in it surrounded by the dry ice. That way, you'll be able to use a full bottle and you remove the transfer back into the bottle.
Supercritical CO2 can dissolve stuff, so I'd love to see what happens to flowers, or flavoured food like potato chips or puffed corn sticks, or just spices!
Nile red recently made some pop rocks and it seems fluids benefit from agitation in order to dissolve more co2. Maybe put a magnetic stir bar in there somehow? would be cool to also see a metal shop approach to building the machine he has and maybe make some pop rocks with it but in your own way
I don't think the pop rocks care that much about the dissolving and it is more about trapping high pressure CO2 bubbles in the sugar. Mixing might still help though. You would need to be able to turn it off before releasing the pressure because mixing in regular air would probably knock a lot of the trapped CO2 out of the solution.
Well Nile had stirring in his apparatus to agitate the sugar to absorb more carbonation. More solid material like sugar candy absorbs it better than way.
@8:50 This is interesting. I would have expected the Cola-foam to be much lighter in colour due to the extra CO2 -- yet it looks darker and more vigorous after 'treatment'. Odd.
Maybe use the chamber in vertical orientation, and put in the whole bottle without cap. This allows you to avoid liquid transfer later where you will lose a lot of CO2. Regarding the o-ring: maybe it is absorbing CO2, and later when you release the pressure "too fast" the CO2 expands and destroys it. Polymers like to absorb CO2 if the pressure is there. You can see it if you add a piece of acrylic or polycarbonate in the chamber pressurize it with CO2, leave them there for ~24h, then release pressure and let them be on the bench for a few hours.
Regarding the O Ring material: from what i have learned about all elastomers is that no elastomer is gas tight. Maybe you can use some soft metal like copper or aluminum. (Like the headgasket in engines)
I think someone mentioned this too. You should just bubble co2 into the cola directly with a hollow tube(with holes on the sides) and pressurized co2 into the bottle. Make sure you know how much pressure the bottle can handle. This way, you dont have to pressurize and unpressurize the system. I think that pressurization is the cause of your problem.
I think diet coke is supposed to be more powerful, but who remembers. You might also want to increase the surface area of the Mentos, by crushing them. It'd be even better if you put them in that dissolveable plastic stuff they use for dishwasher pods and you could let the mentos sink to the bottom (although they might float which would suck.). Or a tube maybe which you could shoot the mentos dust into the bottom?
You should do a series on compressing combustibles. Make a see-through cylinder and show how diesel ignites, maybe see if gunpowder and things will be easier to ignite under pressure etc. I've been a long time fan of you guys and I feel like you've had a hard time recently finding new things to crush. Give us explosions 😎. Thanks for all the content and happy holidays
It helps a lot to line the mentos up and drop them all in at once. Otherwise the reaction is slower if they're all dropped in one at a time. A tiny dab of glue to hold them would work good too.
Viton I think has a good resistance listed, otherwise; We used to use a brass impregnated Teflon as a seal for heavy duty cylinders. They are a pain to get on as you have to stretch them on ( put them in boiling water first) then you need to get them back to shape with a jig or some shim stock and hose clamps over it for a couple of hours. most good seal shops can machine them for you, it may hold up better
You could skip the pouring step with a container designed to have a bottleneck added after it came out of the pressure chamber. Steel could fasten with magnets, for example. It wouldn't even need to be a pretty bottleneck, just a circular plate of a diameter greater than the container, a hole in the middle and a short piece of narrow pipe welded over the hole. Maybe also an o-ring or other circular bit of rubber glued onto it to contain leaks around the rim of the container. The main problem would be getting the inside of the container to be smooth enough to not cause rapid degassing. A glass or plastic liner might solve that though. The other problem is that it would be harder to do a fair control experiment with unpressurised diet cola.
If you retry this operating, try turning the tank in vertical and use the original bottle (switch smaller bottle size if needed) with only the cap removed. The concentration and pressure of CO2 should do the trick if you let it stay for a couple of hours. That might also reduce the amount of heating you need to do.
Temperature is key for the soluability of the CO2 in water. The colder the better. If you have the temp close to 0C, vent slowly (dropping pressure cools, freezjng will squeeze out CO2). If you put a valve on it that doesn't shut on slow release, but will if you dump it quickly (towards the end where you have some bar left), you can seal the bottle before opening the chamber, and cool the liquid down to like 5C (so it don't freeze when you open it). You can also use the dry ice for jacking spirits and things like cider.
Years ago, when they tested several different sodas including Pepsi, Coke and Diet Coke, they found that Diet Coke with Aspartame sweetner, gave a larger geyser. I don't know why for years, People used regular Coke instead of Diet Coke. A much higher geyser results.
Capture some air, within plastic wrap, making a plastic membrane around the mentos. NEXT, Submerge the mentor within the soda bottle with the lid of, and pressurize the chamber, you should see the liquid push through the plastic
Could it have something to do with PH? Water starts at neutral, Cola is around 2 (as memory serves). T-shirt idea: "PRESSURE - IT WÖRKS!" Thanks for the video.
It's critical that you use Diet soda. I've done a side by side between regular soda and diet soda. The difference of the 'fountain' was Regular soda went about 30 cms vertical whereas diet soda went about 2 meters straight up.
should try going mentos water, for comparison. but put them in glasses so you dont have the plastic box problem. I also think if you freeze it by mistake taking the pressure out too quick, that gets rid of a lot of carbonation.
I'm only a few minutes in but I'm really excited to watch the whole thing but something occurred to me and that is that I thought this worked always best with diet soda and mentos. Something about the amounts of dissolved solids is less in diet so it can hold more carbonation
The plastic surface of those containers definitely contributed to the loss of a lot of CO2. Glass storage containers and a funnel could help a lot in the future. Though other people in the comments have some lower effort and likely better ideas
alot of these comments are very good, and i would also posit that the water held more carbonation because it had more room for holding dissolved gas-- whereas the cola has more other things dissolved in it already and can only hold so much extra.
Drop the Mentos into the Coke while it's super critical! I thought you were going to do the whole experiment inside the red tube you carbonated the Coke in. Like use magnetics to drop the Mentos from the ceiling of the tube into the Coke while it was super critical. (I don't know how magnetics would work because it's a metal tube. Maybe a super strong magnet on the outside to repel the Mentos on a magnet inside.)
Much of the noise from the gas release is turbulence around the ball valve. A ~50cm piece of pipe threaded on there should quiet it down by a fair amount.
I think on high vacuum systems they have a copper gasket and the two sides of the chamber squish it together with a little ridge that cuts a bit into the copper ring making a completely air tight seal. I think they are single use so that probably isnt helpful for your situation.
Maybe super carbonating pure water or club soda. Something with less things dissolved in it. I was thinking there would be fewer nucleation sites might react more violently when the mentos are added and possibly hold more CO2 in solution.
Can you stand the chamber vertical? You could open the cap on the bottle and not need to pour it out. Stand the bottle up and drop the dry ice around it maybe, if it is long enough and fits inside? If pouring back and forth is the problem, that could fix it. But like you found out, the water worked much better. Hard to say.
Hmm, maybe you should think up some contraption to screw to the top of the bottle that enables you to drop the mento's in without loosing pressure! 💥 maybe?
Couldn't you place the pressure chamber on-end? Then you'd be able to place the bottle in upright and shouldn't loose any soda. Being upright will also keep the o-ring from getting "messy".
Maybe Try Viton for the O-rings. They work better then rubber or Nitrile on some chemicals. Often Viton is Tan color so users can ID it in cars etc. There is a Green seals to work with other chemicals but can't remember type of materiel.
You could probly put the chambour upside down and have a pipe directly down to the bottle having it turn from super critical to normal when it hit the bottle. Could probobly presuize it a bit to.. but that may be a bit damgerus
What is the solubility of CO2 vs temperature? Assuming it is inversely proportional to temp, lower the temperature to most you can go while still being liquid and then drop in Mentos. Otherwise, try a chamber big enough and tall enough to hold Coke bottle upright and drop Mentos in air at the same PSI as the triple point of the CO2. Then compare to Mentos at the triple point. Could also try replacing the CO2 at pressure with air at pressure and then drop Mentos.
Butyl rubber. Supercritical carbon dioxide is VERY good at dissolving and leeching out the plasticizers in pretty much all rubber while regular carbon dioxide is not. You probably want something vulcanized and crosslinked, so probably butyl rubber or CSPE if you can find it. Nitrile rubber, PVC (rubber) and urethane are probably chemically fine, but they use pthalates (usually) as plasticizers (the thing that makes them flexible and not hard) and the pthalates get dissolved in supercritical CO2. That's my best guess anyway. Its also why you can use almost anything as a window for supercritical CO2, acrylic, polycarbonate, doesn't matter much. in the hard material there's no plasticizer matrix for the CO2 to permeate. -edit keep in mind I haven't actually tried this. Its just an educated guess.
Temperature is going to have an effect on the speed of the reaction... If you decompress the chamber, you will be chilling the carbonated liquid a lot. That will slow down the reaction quite a bit. I am not sure that you will be able to dissolve any more CO2 into the the Coke than what it comes with from the store.
could you test with all different COCA-COLA's without anything done to it, witch one shoots the fountain highest and then use that one on your next super-critical carbonation test? could test with PEPSI too?
Instead of compressing the co2 and then heating it to make it supercritical... can a substance become super critical by means of a chemical reaction, creating the increased pressure?
It would be cool to carbonate some water with universal indicator to get an estimation of how acidic it gets under supercritical pressure and how much is lost under depressurisation.
You are doing it wrong Laurie. Do not ad menthos into the bottle while opened, do it with the bottle closed, tight, and wait for the explosion, usually the cap goes off, and the high pressure accumulated springs meters high into the air. If you turn it upside down and place it into a pipe slightly larger, when the cap pops, you have a cola rocket shooting dozens of meters into the air. One way to put menthos in with the cap on is to drill small hole in them, pass a thin fishing wire through them, put them in above the liquid, put the cap on a bit tight, cut the remaining string as short as possible around the cap, undo the cap for one second to drop the menthos in than re tighten the cap fast and well. And run.... For the rocket use the same method but tighten the cap well from beginning than turn the bottle upside down and in the pipe, than... run.
What happens if you bring the chamber to well beyond supercritical pressure, let the CO2 dissolve, back the pressure off to a lower, but still supercritical pressure, and drop the mentos in without depressurizing the rest of the way to ambient?
Why not just get a CO2 bottle and pump the CO directly into a sealed Coke Bottle. Basically, super charge the amount of CO2 in the Coke. Leave out the pressure chamber. Then drop the Mentos in. Of course, you'd need to be careful to not over pressurize the plastic Coke bottle so that it explodes. Or pour the Coke into a strong see through container and then pump the CO2 into that.
Was thinking about that too, no way a plastic soda bottle can take 80 bar. (~ 1100 PSI) Not sure on the ambient in the chamber, but cold liquids can dissolve more volumes of CO2, venting off the CO2 should be chilling the coke, I'm surprised it wasn't slush when the chamber was opened.
stand the chamber on its end and leave the coke in the bottle and try again should be a better result as for the oring you can use a ptfe wiper infront of the oring
![ILLSLICK - KILLSHOT REMIX [FULL VERSION]](http://i.ytimg.com/vi/RIK8RrqIAzE/mqdefault.jpg)
I just realised from the comments that the pressure chamber should be standing up so that we could fit the whole bottle in :D I think we might need to revisit this like that and also try with glass bottle and pure water if that gives more explody results?
Yeah... and I think if the bottle isn't completely full then you could have a larger surface area inside the bottle... on the other hand, it may not work as well when adding Mentos if it isn't full (like you said)...
Definitely worth a try!
Didn't the ice in the water last time make the difference?
Should be Diet Coke for best results, aspartane lowers surface tension.
I will Watch & Like all your videos. If the experiment Fails or is a Success, does not matter... Its For Science! Love you videos!
7:27
BTP: Has a pressure chamber, hydraulic press, and all kinds of cool gadgets.
Also BTP: Doesn't have a simple kitchen funnel.
There are ingredients in Coke that act as surfactants - that is, they are like soap - that trap the bubbles in a foam. Diet coke has more effective surfactants than regular coke does.
This was light cola, it's just branded cola zero here
Coke zero and diet coke don't have the same ingredients, at least in the UK, Diet Coke has always seemed like it performed the best when I have done the mentos thing it for the kids
yeah if diet is possible it works better than zero
So, add a few drops of dish soap in the coke before super-carbonating it.
Adding more surfactant may interfere with the Nucleation process. Nucleation is was causes the bubbling.
"There's lot of shit going on inside that chamber" - Me after Thanksgiving dinner...
Mention politics during Thanksgiving dinner. It'll save you money on Christmas gifts 🙃
Grandma, those brownies ain’t for you.
Me after loots of eating hot taco...
Sounds like the morning after my Final Solution chili.
I think you're going to lose a lot of CO2 just by pouring the Coca-Cola into the bottle again.
If you could have the cylinder standing, you might be able to fit an open bottle into the chamber. That doesn't solve the issue of surface area for the CO2 to be dissolved into the liquid, because you end up with a much smaller surface area to do it.
The chamber you have might not be able to do it, but one solution might be to have a small, battery powered air pump and a small hose inserted into the Coca-Cola, bubbling the cylinder's internal atmosphere through the liquid.
That way, when you're ready to do the Mentos test, "all" you need to do is remove the top and pump, and you just drop the Mentos into the bottle.
We lost way more when lowering the pressure on the chamber the liquid was boiling like crazy there. While pouring it to the bottle I didn't see much of anything happening. But I think if we just lift the thing up we can have bottle in there as whole. Not sure why I get the idea now :D We could also try with just water if that would work better.
@@Beyondthepress the previous glass beaker had no bubbles nucleating because it was so smooth. The plastic containers were bubbling like crazy even with the normal coke.
@@Beyondthepress Just leave it overnight, or even a couple of days, to compensate for the smaller surface area.
He could try standing the chamber up vertically to attempt using a graduated beaker
@@Beyondthepress I guess carbonated water will work quite well! Please give it a try!!!
Laurie opening the CO2 release valve like he's handling the Demon's core or something 😄
I honestly don't blame him.
Potential for fatal failure is very real here!
It's just Lauri, no e at the end.
Demon core… that’s an idea
That is the proper way to handle the release on that much pressure. I will take my chances with the demons
What if you carbonate vinegar and then throw baking soda in it?
Baking soda is bicarbonate. Would be interesting to see what happens
The CO2 would react with water to make bicarbonate which is baking soda. This would react with the acetic acid and they would neutralize. The. You throw in sodium bicarbonate, e.g. baking soda, and the baking soda would dissolve peacefully until it reached saturation.
@@EricDKaufman uhm actually ☝️🤓 the CO2 reacts with water to create carbonic acid so it will just make a mix of acid, acetic acid (vinegar) and carbonic acid (CO2 dissolved in water)
ok... maybe it will release some CO2 when you mix it, but it wont neutralize the vinegar, because carbonic acid and sodium bicarbonate (baking soda) is not the same
@@EricDKaufman You need to brush up your chemistry lessons.
Baking soda, or sodium bicarbonate, is a base. Adding bicarbonate to carbonated water will cause the bicarbonate to react with the carbonic acid, releasing more CO2 in the process, leaving sodium carbonyle salt behind.
If this happens, there also needs to be a fizzy vinegar taste test
For O-rings, Viton or Fluorosilicone might be good options. I think Viton generally resists acids better, but Fluorosilicone holds up better at very low temperatures.
Glass bottle in the chamber standing vertically will absolutely work the best. Also let the chamber depressurize slower.
You loose carbonation to the plastic containers causing nucleation points, and the quick pressure change will agitate the surface of the liquid. Also you'll loose a lot transferring if its fully carbonated already, so you want to do it in the bottle from the start by putting the chamber on its side
For some reason I thought it had to be Diet Coke
We have diet coke branded as Coca Cola zero here. But it's like the black thing on the middle of the bird poop, it's the same shit :D
@ Words Of Science 🤣
Diet Coke and Coke Zero work better than regular Coca-Cola because the sugar in regular Coca-Cola is sticky, and so it slows down the reaction.
Doesn't make much difference, but it's much easier to clean up.
Diet Coke definitely reacts more strongly than regular coke or even Coke Zero. I think Diet Coke is called Coke Lite in Europe, or at least it was like that in the UK, Austria and Hungary last time I was there.
Liquid CO2 is routinely used as a solvent, in particular to extract vegetable oils. It's advantages are : It don't react with the oils and you can remove all of it.
Repeat this, but with the pressure chamber set vertically so that you can place the whole bottle in it surrounded by the dry ice. That way, you'll be able to use a full bottle and you remove the transfer back into the bottle.
It's works really well for making live resin, its the only way to get almost 100% of the terpenes.
Supercritical CO2 can dissolve stuff, so I'd love to see what happens to flowers, or flavoured food like potato chips or puffed corn sticks, or just spices!
Nile red recently made some pop rocks and it seems fluids benefit from agitation in order to dissolve more co2. Maybe put a magnetic stir bar in there somehow? would be cool to also see a metal shop approach to building the machine he has and maybe make some pop rocks with it but in your own way
I don't think the pop rocks care that much about the dissolving and it is more about trapping high pressure CO2 bubbles in the sugar. Mixing might still help though. You would need to be able to turn it off before releasing the pressure because mixing in regular air would probably knock a lot of the trapped CO2 out of the solution.
@greatnate29 I don't think you know what you're talking about. The sugar was hot and molten in a pressurized environment in order to absorb the CO2
Well Nile had stirring in his apparatus to agitate the sugar to absorb more carbonation. More solid material like sugar candy absorbs it better than way.
The pressurized CO2 was trapped in air pockets caused by the stirring motion. Was not absorbed into the candy like soda water does.
@8:50 This is interesting. I would have expected the Cola-foam to be much lighter in colour due to the extra CO2 -- yet it looks darker and more vigorous after 'treatment'. Odd.
The atomic bomb of Coke and Mentos. I love it. 😂
"Subscribe for MORE Stupidity"
I couldn't say it better myself.
"Subscribe for more stupidity" I love it! )
Maybe use the chamber in vertical orientation, and put in the whole bottle without cap. This allows you to avoid liquid transfer later where you will lose a lot of CO2.
Regarding the o-ring: maybe it is absorbing CO2, and later when you release the pressure "too fast" the CO2 expands and destroys it. Polymers like to absorb CO2 if the pressure is there. You can see it if you add a piece of acrylic or polycarbonate in the chamber pressurize it with CO2, leave them there for ~24h, then release pressure and let them be on the bench for a few hours.
Regarding the O Ring material: from what i have learned about all elastomers is that no elastomer is gas tight.
Maybe you can use some soft metal like copper or aluminum. (Like the headgasket in engines)
Indium
@@WaffleStaffelthat would be expensive as hail
I think someone mentioned this too. You should just bubble co2 into the cola directly with a hollow tube(with holes on the sides) and pressurized co2 into the bottle. Make sure you know how much pressure the bottle can handle. This way, you dont have to pressurize and unpressurize the system. I think that pressurization is the cause of your problem.
I think diet coke is supposed to be more powerful, but who remembers. You might also want to increase the surface area of the Mentos, by crushing them. It'd be even better if you put them in that dissolveable plastic stuff they use for dishwasher pods and you could let the mentos sink to the bottom (although they might float which would suck.). Or a tube maybe which you could shoot the mentos dust into the bottom?
You should do a series on compressing combustibles. Make a see-through cylinder and show how diesel ignites, maybe see if gunpowder and things will be easier to ignite under pressure etc. I've been a long time fan of you guys and I feel like you've had a hard time recently finding new things to crush. Give us explosions 😎. Thanks for all the content and happy holidays
10:05 "Everything was boiling like boiling" 😂
It helps a lot to line the mentos up and drop them all in at once. Otherwise the reaction is slower if they're all dropped in one at a time. A tiny dab of glue to hold them would work good too.
Viton I think has a good resistance listed, otherwise;
We used to use a brass impregnated Teflon as a seal for heavy duty cylinders. They are a pain to get on as you have to stretch them on ( put them in boiling water first) then you need to get them back to shape with a jig or some shim stock and hose clamps over it for a couple of hours. most good seal shops can machine them for you, it may hold up better
Good utilization of your adjustable science hammer to achieve rapid controlled depressurization.
You could skip the pouring step with a container designed to have a bottleneck added after it came out of the pressure chamber. Steel could fasten with magnets, for example. It wouldn't even need to be a pretty bottleneck, just a circular plate of a diameter greater than the container, a hole in the middle and a short piece of narrow pipe welded over the hole. Maybe also an o-ring or other circular bit of rubber glued onto it to contain leaks around the rim of the container.
The main problem would be getting the inside of the container to be smooth enough to not cause rapid degassing. A glass or plastic liner might solve that though.
The other problem is that it would be harder to do a fair control experiment with unpressurised diet cola.
4:03 Oh nooo, you must throw an entire package of Mentos into the Coca-Cola! 🤭
The pressure chamber channel :)
I love these kinds of experiments.
If you retry this operating, try turning the tank in vertical and use the original bottle (switch smaller bottle size if needed) with only the cap removed. The concentration and pressure of CO2 should do the trick if you let it stay for a couple of hours. That might also reduce the amount of heating you need to do.
Temperature is key for the soluability of the CO2 in water. The colder the better. If you have the temp close to 0C, vent slowly (dropping pressure cools, freezjng will squeeze out CO2). If you put a valve on it that doesn't shut on slow release, but will if you dump it quickly (towards the end where you have some bar left), you can seal the bottle before opening the chamber, and cool the liquid down to like 5C (so it don't freeze when you open it).
You can also use the dry ice for jacking spirits and things like cider.
Years ago, when they tested several different sodas including Pepsi, Coke and Diet Coke, they found that Diet Coke with Aspartame sweetner, gave a larger geyser. I don't know why for years, People used regular Coke instead of Diet Coke. A much higher geyser results.
This was light cola, it's just branded cola zero here
Thats not diet coke thats coke zero totally different @Beyondthepress
Thank you!! I’m pretty surprised that it wasn’t dramatic. But everything you do is fun and hilarious no matter what.
Looks like a new subgenre of the show is emerging- "supercritical fluid science video"! This can have many prospects for sure.
Capture some air, within plastic wrap, making a plastic membrane around the mentos. NEXT, Submerge the mentor within the soda bottle with the lid of, and pressurize the chamber, you should see the liquid push through the plastic
Could it have something to do with PH? Water starts at neutral, Cola is around 2 (as memory serves). T-shirt idea: "PRESSURE - IT WÖRKS!" Thanks for the video.
It's critical that you use Diet soda.
I've done a side by side between regular soda and diet soda. The difference of the 'fountain' was
Regular soda went about 30 cms vertical whereas diet soda went about 2 meters straight up.
should try going mentos water, for comparison. but put them in glasses so you dont have the plastic box problem. I also think if you freeze it by mistake taking the pressure out too quick, that gets rid of a lot of carbonation.
The most explosive reactions are created with lots of Mentos quickly dropping into 2 liter bottles of warm Diet Coke.
I'm only a few minutes in but I'm really excited to watch the whole thing but something occurred to me and that is that I thought this worked always best with diet soda and mentos. Something about the amounts of dissolved solids is less in diet so it can hold more carbonation
The plastic surface of those containers definitely contributed to the loss of a lot of CO2. Glass storage containers and a funnel could help a lot in the future. Though other people in the comments have some lower effort and likely better ideas
alot of these comments are very good, and i would also posit that the water held more carbonation because it had more room for holding dissolved gas-- whereas the cola has more other things dissolved in it already and can only hold so much extra.
5:08 Snowing inside in Finland. Yah, that checks out.
Drop the Mentos into the Coke while it's super critical!
I thought you were going to do the whole experiment inside the red tube you carbonated the Coke in. Like use magnetics to drop the Mentos from the ceiling of the tube into the Coke while it was super critical.
(I don't know how magnetics would work because it's a metal tube. Maybe a super strong magnet on the outside to repel the Mentos on a magnet inside.)
Much of the noise from the gas release is turbulence around the ball valve. A ~50cm piece of pipe threaded on there should quiet it down by a fair amount.
It was not the expected result, but a nice journey all the same. Thanks for the videos.
I want to see the pressure chamber explode. Maybe fill it with water and put it on a super hot fire? What ever could make this beast pop.
I would like to see super fizzy water vs. super fizzy coca-cola compare
If you would like to maximize the effect you could put the chamber vertically and put it with the bottle.
I think on high vacuum systems they have a copper gasket and the two sides of the chamber squish it together with a little ridge that cuts a bit into the copper ring making a completely air tight seal. I think they are single use so that probably isnt helpful for your situation.
The Facebook video joke made the video more than worth it
Maybe super carbonating pure water or club soda. Something with less things dissolved in it. I was thinking there would be fewer nucleation sites might react more violently when the mentos are added and possibly hold more CO2 in solution.
I'm pretty sure that diet coke has a stronger/more violent reaction as well, though unsure if it would make that much of a difference.
Thank you for the video ! ☺👍♥
Would be cool if you had a bigger chamber and could fit a whole bottle in there, but you gotta work with what you have. Still very cool.
Let's see a do-over with diet coke, carbonated vertically, and with a pipe to direct the whole roll of mentos in!
Can you stand the chamber vertical? You could open the cap on the bottle and not need to pour it out. Stand the bottle up and drop the dry ice around it maybe, if it is long enough and fits inside? If pouring back and forth is the problem, that could fix it. But like you found out, the water worked much better. Hard to say.
Just saw your comment, lol 😂🙃
oh man now I want supercritically charged beer but it would probably blow me up
For that o-ring replacement. Try using o-rings for air conditioning systems.
Hmm, maybe you should think up some contraption to screw to the top of the bottle that enables you to drop the mento's in without loosing pressure! 💥 maybe?
Whoa man!! Are you trying to blow up the world!?
We found viton o rings very durable in three hundred bar hydraulic systems. Great video,👍
Couldn't you place the pressure chamber on-end? Then you'd be able to place the bottle in upright and shouldn't loose any soda. Being upright will also keep the o-ring from getting "messy".
Maybe Try Viton for the O-rings. They work better then rubber or Nitrile on some chemicals. Often Viton is Tan color so users can ID it in cars etc. There is a Green seals to work with other chemicals but can't remember type of materiel.
You could probly put the chambour upside down and have a pipe directly down to the bottle having it turn from super critical to normal when it hit the bottle. Could probobly presuize it a bit to.. but that may be a bit damgerus
Thinking about Nilered’s aerogel video, I am wondering if you can make aerogel with this chamber
What is the solubility of CO2 vs temperature? Assuming it is inversely proportional to temp, lower the temperature to most you can go while still being liquid and then drop in Mentos. Otherwise, try a chamber big enough and tall enough to hold Coke bottle upright and drop Mentos in air at the same PSI as the triple point of the CO2. Then compare to Mentos at the triple point. Could also try replacing the CO2 at pressure with air at pressure and then drop Mentos.
You have to remember that Carbon Dioxide is ACIDIC so you have to use an O-Ring material that can tolerate ACIDS
Butyl rubber. Supercritical carbon dioxide is VERY good at dissolving and leeching out the plasticizers in pretty much all rubber while regular carbon dioxide is not. You probably want something vulcanized and crosslinked, so probably butyl rubber or CSPE if you can find it.
Nitrile rubber, PVC (rubber) and urethane are probably chemically fine, but they use pthalates (usually) as plasticizers (the thing that makes them flexible and not hard) and the pthalates get dissolved in supercritical CO2.
That's my best guess anyway. Its also why you can use almost anything as a window for supercritical CO2, acrylic, polycarbonate, doesn't matter much. in the hard material there's no plasticizer matrix for the CO2 to permeate.
-edit
keep in mind I haven't actually tried this. Its just an educated guess.
Make a tube that fits to the bottle and releases ALL the Mentos into the bottle at once.
Awwww - disappointing! You were right about the click-bait! I look forward to "Super Critical Diet Coke and Mentos 5-million"!
if your o-rings are nitrile, try silicone... might hold up better to the heat and chemicals
Where's your funnel, man? -1 point for that 😉😂
Temperature is going to have an effect on the speed of the reaction...
If you decompress the chamber, you will be chilling the carbonated liquid a lot. That will slow down the reaction quite a bit.
I am not sure that you will be able to dissolve any more CO2 into the the Coke than what it comes with from the store.
Try going around triple point - i.e. without going through liquid phase again.
You should test what happens with lithium polymer battery at low pressure. 😜
7:30 when Finland finally discovers funnel technology, it's OVER for Russia.
Watch the myth busters episode on this exact thing. They figure out the exact chemical that is responsible for the mentos/coke explosion
could you test with all different COCA-COLA's without anything done to it, witch one shoots the fountain highest and then use that one on your next super-critical carbonation test? could test with PEPSI too?
We, a bunch of dismantlers in an auyorecycling facility, found warm diet coke worked the best. Like left in a car for 4hrs in 35°C warm diet coke.
Instead of compressing the co2 and then heating it to make it supercritical... can a substance become super critical by means of a chemical reaction, creating the increased pressure?
0:52 - that's a man after my own heart! Pepsi is the best! 😅
Stand the pressure vessel on its end so the bottle fits. Also how about carbonated vinegar and soda?
It would be cool to carbonate some water with universal indicator to get an estimation of how acidic it gets under supercritical pressure and how much is lost under depressurisation.
You are doing it wrong Laurie.
Do not ad menthos into the bottle while opened, do it with the bottle closed, tight, and wait for the explosion, usually the cap goes off, and the high pressure accumulated springs meters high into the air.
If you turn it upside down and place it into a pipe slightly larger, when the cap pops, you have a cola rocket shooting dozens of meters into the air.
One way to put menthos in with the cap on is to drill small hole in them, pass a thin fishing wire through them, put them in above the liquid, put the cap on a bit tight, cut the remaining string as short as possible around the cap, undo the cap for one second to drop the menthos in than re tighten the cap fast and well. And run....
For the rocket use the same method but tighten the cap well from beginning than turn the bottle upside down and in the pipe, than... run.
For O ring material, maybe a metal one would provide the best result, copper or tin?
Do you ever magna flux the bolts on your chamber?
What happens if you bring the chamber to well beyond supercritical pressure, let the CO2 dissolve, back the pressure off to a lower, but still supercritical pressure, and drop the mentos in without depressurizing the rest of the way to ambient?
Why not just get a CO2 bottle and pump the CO directly into a sealed Coke Bottle. Basically, super charge the amount of CO2 in the Coke. Leave out the pressure chamber. Then drop the Mentos in. Of course, you'd need to be careful to not over pressurize the plastic Coke bottle so that it explodes. Or pour the Coke into a strong see through container and then pump the CO2 into that.
Was thinking about that too, no way a plastic soda bottle can take 80 bar. (~ 1100 PSI) Not sure on the ambient in the chamber, but cold liquids can dissolve more volumes of CO2, venting off the CO2 should be chilling the coke, I'm surprised it wasn't slush when the chamber was opened.
Yep, this is going to break the internet for sure. 😂 still cool though!
I don't think ive seen video of "wet" dry ice before on u tube.👍👍👍👍
Concentrated carbonic acid cola. My favourite.
I haven’t read this yet. Is it possible that the water has no nucleation points for the gas to form allowing it to be supersaturated…?
stand the chamber on its end and leave the coke in the bottle and try again should be a better result as for the oring you can use a ptfe wiper infront of the oring
Maybe use a car exhaust silencer to dampen the sound of letting out the CO2?
probably should put an airhorn on the release valve, just for fun :o
Can you make a fluffy fish to fry? Thinking that all the ruptures in the cells would make tender meat.
would carbonated gasoline have a hard time burning in a small open top container because of the CO2?
Neat experiment. The original was done with Diet Coke (not regular Coke). I think it matters quite a bit.
This isn't regular Coca Cola. this is the zero sugar one. "Diet coke" doesn't exist in Europe.
Would a firecracker under pressure be less ?