You prolly dont care but if you guys are bored like me atm then you can stream pretty much all the latest movies and series on instaflixxer. I've been watching with my brother these days =)
Sherrie Wang I hope you watch this in the future and learn that "hey, maybe just feeding my students one example after another isnt working as every year all my students try to drop to go to the other instructor, this whole teaching the foundation thing that Kahn does is pretty useful"
You can convert C to K by adding 273 to the C. Just so you know, though, it doesn't matter if you use C or K for delta T. The difference is going to be the same.
Hi, this is awesome! But is it possible if you could please reduce shaking the cursor so much? It's kinda distractive. I end up not paying attention sometimes. But you explain really well! :)
Chemistry was bothering me for the longest time. There was just something about how it was being taught that felt very unintuitive. I knew there should be a better way to explain all these quantities (deltaH, Q, deltaU, W, P, V) without making a person insane. Thanks, again Sal :)
Thank you for adding caption to this however; you are not allowing time for readers to read and see what you are doing. :) But still thank you for making caption..
Sal, im just wondering that you mentioned that internal energy is the combined sum of al kinetic and potential energy in a system. Considering Pressure and volume didnt change in the reaction above how was there a change in the U (internal energy) if the potential enervgy on the right hand equation got converted to kinetic energy? wouldnt the total internal energy (KE + PE) be the same?
If someone could pls help that would be awesome: Is heat of formation the change in enthalpy between the REACTANTS and products, or the ELEMENTS in the reactants and the products?
It is reactants and products. Elemental reactants are used to get a relative idea of enthalpy and then extrapolated to other reactants theoretically by simple arithmetic.
For me I really like corn What do you like about corn? Its corn! A big lump with knobs It has the juice (it has the juice) I can't imagine a more beautiful thing (Woo) It's corn!
Perhaps, but I think it's more to do with the fact that it's not been given a very clear definition yet. Sal said it himself, he was just arbitrarily coming up with a definition (in the sense of a formula) for it (of course, he wasn't actually coming up with it then and there, but you see what I'm saying). So there's just not a very clear idea in my mind yet of what it means, in other words I haven't quite wrapped my brain around it, so it ends up sounding kind of meaningless sometimes.
What really messes me up here is that CH4 is used as a fuel and it's able to release more energy when converted to water and CO2. So that must mean CO2 and H2O have an even lower level of energy than solid carbon and H2. But I also thought that bigger molecules held more energy than smaller ones. Am I incorrect in this assumption?
Why does endothermic reaction(i;e we add heat to reactants and hence increase their energy) occur despite everything in universe wants to be in its lower energy state
You get the standard heat of formation for methane from a chemistry textbook table or other source, and subtract the sum of the standard heats of formation for carbon and hydrogen in elemental form(which is 0 for both). The heat of formation of methane is about 74 kJ. Subtract 0 from this value and you have your answer.
give this man a prize. he saved me again this year, I wish more teacher would explain things so good as him.
I too, like to take my chemistry set to the beach.
Scienceizm why
You prolly dont care but if you guys are bored like me atm then you can stream pretty much all the latest movies and series on instaflixxer. I've been watching with my brother these days =)
@Baylor Jacob yup, I've been watching on InstaFlixxer for months myself :D
Sherrie Wang I hope you watch this in the future and learn that "hey, maybe just feeding my students one example after another isnt working as every year all my students try to drop to go to the other instructor, this whole teaching the foundation thing that Kahn does is pretty useful"
I got distracted by those perfectly straight lines you drew free handed. Very good video I love Khan academy!
+Brona Kennedy bro i'm really sorry but he was most likely using the straight line tool in paint.
You can convert C to K by adding 273 to the C. Just so you know, though, it doesn't matter if you use C or K for delta T. The difference is going to be the same.
awesome!
Hi, this is awesome! But is it possible if you could please reduce shaking the cursor so much? It's kinda distractive. I end up not paying attention sometimes. But you explain really well! :)
Come teach at my school please!
Chemistry was bothering me for the longest time. There was just something about how it was being taught that felt very unintuitive. I knew there should be a better way to explain all these quantities (deltaH, Q, deltaU, W, P, V) without making a person insane.
Thanks, again Sal :)
Thank you for adding caption to this however; you are not allowing time for readers to read and see what you are doing. :) But still thank you for making caption..
ooooooh best teacher
Thank you
My Chemistry teacher probably disliked this. Poor lady wishes she could've done a better job... so do I >.>
At 11:27 Salman could have meaned "So you'd have to say plus 249 KJ"
Great video thank you
Sal, im just wondering that you mentioned that internal energy is the combined sum of al kinetic and potential energy in a system. Considering Pressure and volume didnt change in the reaction above how was there a change in the U (internal energy) if the potential enervgy on the right hand equation got converted to kinetic energy? wouldnt the total internal energy (KE + PE) be the same?
Thank you awesome
thank you!
If someone could pls help that would be awesome:
Is heat of formation the change in enthalpy between the REACTANTS and products, or the ELEMENTS in the reactants and the products?
It is reactants and products. Elemental reactants are used to get a relative idea of enthalpy and then extrapolated to other reactants theoretically by simple arithmetic.
666ILIKECAKE thanks! :)
For me
I really like corn
What do you like about corn?
Its corn!
A big lump with knobs
It has the juice (it has the juice)
I can't imagine a more beautiful thing (Woo)
It's corn!
Perhaps, but I think it's more to do with the fact that it's not been given a very clear definition yet. Sal said it himself, he was just arbitrarily coming up with a definition (in the sense of a formula) for it (of course, he wasn't actually coming up with it then and there, but you see what I'm saying). So there's just not a very clear idea in my mind yet of what it means, in other words I haven't quite wrapped my brain around it, so it ends up sounding kind of meaningless sometimes.
Yea, I also bring my chemistry set to the beach
zaxneo I don't get it
What really messes me up here is that CH4 is used as a fuel and it's able to release more energy when converted to water and CO2.
So that must mean CO2 and H2O have an even lower level of energy than solid carbon and H2.
But I also thought that bigger molecules held more energy than smaller ones. Am I incorrect in this assumption?
4:32 dat axis lol =)
This video have a ringing to it. Can the audio be fixed?
at 8:22, how can -74 kj and +74 kj, both be exothermic reactions?
Im not completely sure but i think he had a minor mistake there
Yeah, just "oneself" would've been good since she already started with "one".
Can you replace my chem teacher?
Why does endothermic reaction(i;e we add heat to reactants and hence increase their energy) occur despite everything in universe wants to be in its lower energy state
Plzz do answer me
This was back in the day where Wikipedia was still reliable
ILY
carbon reacts with hydrogen to give "MATHANE" :v
I should be able to give this 50 likes
How do you get the heat of the reaction in J when you took the measurements in C? I'm trying to do my lab report and I'm just LOST ):
love it
Does anybody know which program he is using ?
Tumra ma ka boor program
Fucking awesome. Thank you.
how did you get 74 kj at the beggining
You get the standard heat of formation for methane from a chemistry textbook table or other source, and subtract the sum of the standard heats of formation for carbon and hydrogen in elemental form(which is 0 for both). The heat of formation of methane is about 74 kJ. Subtract 0 from this value and you have your answer.
+EZstrategies nice phat
why cant u b my teacher
you you will take your chemistry beakers on the beach😅😅😅😅😅😅😅!!!!!!!;
my chemistry teacher needs to be fired.
or himself...