Calorimetry: Crash Course Chemistry #19
ฝัง
- เผยแพร่เมื่อ 6 มิ.ย. 2024
- Today's episode dives into the HOW of enthalpy. How we calculate it, and how we determine it experimentally...even if our determinations here at Crash Course Chemistry are somewhat shoddy.
Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App!
Download it here for Apple Devices: apple.co/3d4eyZo
Download it here for Android Devices: bit.ly/2SrDulJ
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Table of Contents
Hess' Law 2:30
Calorimeter 3:12
Calorimetry 3:07
Specific Heat Capacity 5:08
Calorimetry Sources of Error 10:21
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Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App!
Download it here for Apple Devices: apple.co/3d4eyZo
Download it here for Android Devices: bit.ly/2SrDulJ
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Hank is such a good role model when it comes to lab safety.
haha! he forgot lab coat & gloves!!
It's hard to take someone seriously when they don't take what they're saying seriously.
it hurt watching that.
+Sara Gates I think its good to bring out topics the way Hank does, because lets say someone is not too into science and they see it as a shady and peculiar topic. Hank introduces topics with some very good and hooking tone that drives readers into the video. However he has a tendency to speak extremely fast, which shows his high prowess in the English Language. However still, Hank is an excellent role model on how he approaches topics in chemistry, and biology.
I wouldn't be worried too much, it's 0.1 M HCl. Some people on TH-cam do challenges eating sour candies with a lower pH than 0.1 M HCl
I normally do not leave comments on youtube. However, you guys have helped me in everything from history to chemistry. You make things so clear, concise, and in a way that makes me pay attention. Thank you and keep up the good work.
I agree, they need more of these types, if you reply 4 years after awesome lol
And once again Crash Course saves my life with a video telling me exactly what to do and how to do it the day before a very important test. Than you Crash Course, thank you.
So i have an enthalpy quiz tomorrow..
thought process rn:
thank you hank
thank you hanks mom for making hank
thank you hanks dad for making hank
thanks god for making hanks family so hank will appear
"Never do the thing that I'm doing"
*desperately wants to do the thing*
exam tomorrow wya
chemistry exam tomorrow, I'm actually going to die
good luck :)
hahhahaha
Afkcorgi yes i did
Same
how was the exam xD?
Hank I appreciate all your videos, they are really uplifting and encouraging to pursue my interest in chemistry, or biology.
Continue the great work.
Our AP Chem teacher encourages us to stir with the thermometer when we use calorimeters. lol we ded
They just break usually stirring rods are used
Also most thermometers these days have alcohol, not mercury.
I'm in first-year university chemistry, people get in trouble for stirring with the thermometer, half of them are mercury, mercury spills are very bad. Or if they're alcohol, they're expensive to replace. Though in Chem 11, my group did break an alcohol thermometer by using it to stir.
i love this guy I've looked so long with someone with understanding of chemistry and can explain it throughly not just read the definition out of a book
this has literally been made almost 10 years ago and this is still extremely useful to people like me. Tysm
For the specific heat capacity portion of the video, I just want to point out that the unit 's' signifies VOLUMETRIC heat capacity (also called volume-specific heat capacity). Volumetric heat capacity is measured per unit volume, whereas specific heat capacity (usually used for solids and denoted by the symbol 'c') is per unit mass.
does this man breathe???? what is his life force?
somepeoplearewild Aliens
+somepeoplearewild He, in a Vlogbrothers Video, stated that he cuts out the breaths he takes because they take up .5 of a second and wastes time. XD Its efficient, its cool, just like Hank. XD
my brain doesn't work as fast as his obviously i get swept away in these because there's no pauses
+somepeoplearewild Its called jump cuts
I slow down the video, but even so still kind of fast.
Did he just say "wiggly woggly, bondy wondy"?
This guy is the Doctor, OH MY GOD.
Exactly my thoughts!!
you are an amazing teacher!! ur videos clear my concepts so much... I find ur lectures way useful than my chemistry teachers' ... thanks a lot!!!
I love crash course chemistry! Keep up the great work team!
When he references Doctor Who!!!:-) Its all wibbly wobbly bony wondy
Thank you so much! I spent to much time researching how do these calculations until I watched your video! Thank you once again!
Thank you for doing this. You guys are amazing! I hope to be like you someday!
literally have my final in about a half hour - thanks! 💞
Thank you for explaining the hess equations explanation. I needed some review but I remembered it.
learned this in class, made no sense. One video and I'm golden! You're saving lives!
Need to add subtitles.I watch this at school.And this is my favorite thing to watch.
Thanx good presentation , I had a tough time with my chemistry teacher's class
For most of the scientific community, specific heat capacity is represented by a lower case c, indicating the heat capacity per gram. A capital C is used for molar heat capacity, with either a P or V subscript for gases, if the calorimetry is done under constant P or constant V conditions. (BTW, Using c makes the heat equation q=mcAT look a lot like the name of a dreaded medical school entrance test, which is easier to remember than your smAT)
This is wonderful. Sadly, by not fault of your own it came out after my chemistry exam. Yeah, the one where I panicked, messed up all my enthalpy and now have permanently f***ed up my A Levels. But thank you - hopefully you can save some other poor soul :)
Thanks for these videos! They help so much!
thank you for this video, I am watching to help my son in his chemistry class and who are all of these people with their infantile negative comments? The should be thankful.
Learnt and enjoyed
I've found that reinforces my memory. When was in AP History last year, we would read a chapter in the book and then learn the previous chapter in class. That way, when we got around to discussing it, it was simultaneously cementing the knowledge in our brain and teaching us new materials.
Wonderful, I shall keep watching until I have seen them all.
4:58-5:00... DId anyone else notice that the Hg was shown as a mirror image...?
Akil Iyer I was watching that thinking,"Why is the symbol so funny looking?"
I love the Tailspin plane in the graphic talking about fuel estimation.
Great video, as usual. On the subject of possible causes of inaccuracies between experimental data and theoretical data - surely the accuracy and precision you were able to measure the temperature was a significant factor as well?
This is by far the most technically difficult Crash Course thus far. That's a great thing.
This was really educational and interesting
THIS MAKES SO MUCH SENSE
OMG that doctor who reference was great!
This brought back so many good memories of high school and college.
you are saving my life!
I did this exact lab a couple of days ago in class. Yes, we used our thermometers as stirring rods. We did get different numbers from Hank's project but it was probably cause we used half the amount of HCl and NaOH
Great job!
Wow, Tailspin reference. I haven't thought of that show in years...
Great video, as always!
This helped me so much for my chemistry lab that is due within 24 hours XD
watching crash course in my holidays preparing for chem next year woop thats how you do it
Best TH-cam channel ever!
Man, I like this show so much!
This Doctor Who reference pleases me greatly.
we did calorimetry in year 7 (though not half as advanced) we burnt monster munch and everyones thermometers exploded in the water we were heating. there were loads of pretty colours like purple and green and everyone wanted theirs to explode too, so as you can probably guess our results weren't great ;)
thank you for existing.
I'm terrified of chemistry.
In my school, the difference between physics and chemistry was VERY clear. Chemistry deals with chemical phenomenons, physics with physical phenomenon. Chemical phenomenon are phenomenons where chemical composition changed, so substances necessarily must mix together. ALL ELSE: physics.
So to me, A LOT of crash course chemistry videos were simply crash course physics videos. I'm not complaining, I'm just amazed you keep treating the diff between physics and chemistry as a matter of opinion.
this brings me back to my high school exam... you should have done this a couple of years ago, it would have saved me a lot of frustration!
I wish you were my chemistry teacher
Sameeeee.
As soon as Hank held up the two bottles next to each other, I was like: D8 Oh crap, he's gonna do it!
Afterwards: Wow, that was actually pretty anticlimactic.
AWWWW SNAP!
Thought Cafe used the Tailspin plane @2:24
Bringing me back guys...
Your so cool! I wish I could do chem like you and know as much as you!! Your like my science hero =). Cheers for existing xD
I love that the plane from tale spin made an appearance in this episode
I'm taking ap chem next year. imnsho glad this exists.
aw man i love this, i love you, i love you man.
very nice work with the episode. But I think there is a inconsistency or am i wrong?
If the value of the heat you calculated by calorimeter (6.2 ) is greater than value calculated by hess's law (5.7), then how is this explained by the reasons mentioned that said that some heat is not accounted for which is lost in calorimeter.
thank youuu i am a little further on my way to understanding gcse chemistry for my exam next thursday:')
Thanks so much👍
This is why the internet is awesome.
AWESOME!
I love this guy
Thank you!!!
I love how he teaches "great" and his expression too "Bondy Wondy"
get this man a lab bench!! I love the awesome set that Hank is filming on, but I think Hank would be safer and could do cooler experiments if he had proper lab bench
THE DOCTOR WHO REFERENCE! YAASSS
yes, that was what I was trying to say but less lengthy. It is also worth noting that H+, or hydrogen ions can also contain nuetrons which is why I really don't like saying exchanging protons. I think it is much simpler and leaves less room for confusion if you say hydrogen nucleus or hydrogen ions.
Just so cool!!!
Morning of the AP Chemistry test!! Woo!!
I gotta say...... You are awesome! You are the one chemist in the entire world i can RELATE to. I love how you sneak in little Easter eggs into the episodes like wibbly-wobbly timey-wimey, David Tennant, Carl Segan, and Live long and prosper. You are like my equal in terms of geekiness.
hello! what is the effect of ignoring the thermometer and stirrer have on the calculated specific heat capacity of the metals?
As a chemistry major Crash Course: Chemistry makes me really happy.
Is it possible to find the final temperature of a reaction using the following equation: T final - T initial = Delta H / s • m ? (assuming I know the initial temperature, change in H, mass of solution/sample, and the specific heat capacity)
True. Didn't make a video out of them and have an editor and a producer and a 100,000+ fan base, however. Seems significant. Students will be attempting to reinforce learning or discover new ways of thinking using these videos.
great video :D
Okay, honestly, if there was gonna be another Doctor, you'd be one of my top picks
Hank, I hope you live in the northern part of Montana because you're coming to Saskatchewan in a couple weeks to write my thermodynamics exam. Thanks by the way
Thanks a lot
Watching this on double speed is a trip
that's not good guys you shouldn't say such things at least he is helping with his videos.
Being curious, I have to ask if the measured value was higher than it was predicted to be possibly because the reaction was not fully neuteralised - if an equal conc. was used for each reactant, then shouldn't they be using?
Off the top of my head, (values may be bad) Na=23, O=16, H=1,Cl = 21?
Meaning NaOH to HCl should be 40:22 or 20:11.
Was that accounted for? I kinda get lost half way through the video...
This guy has a high intelligence I love his videos.
i need that too, and physics, and uhh *looks up other subjects* i'd like a mini series on law/psychology! and homework at the end of these!
Thank you
0:21 A happy face with a *christmas hat*! XD
A man threw some sodium chloride at me the other day it was a salt...
Why was Mercury's periodic symbol backwards?
corona borona ke he me puy ke ji?
When I was in high school, I was a chemistry lab aide. In the first month, I had to make 1M HCl from from 12M stock HCl. My teacher didn't inform me I was supposed to work in the fume hood to do this. My nose was hurting for a week!
can you do one episode explaining what mercury is, and what is it for, and how it effects human body and all about it ? thx :)
Hank when (if you are) will you be doing a titrations video? Because how wuickly the indicator changes is magic :)
Thaks hank for using metric system
I proctored for the chemistry department as a junior in high school and diluting concentrated stock acid down to 1M for lab use was a regular duty for me. Occasional I'd only make a quart of dilute but most of the time it was multiple gallon batches.
That is definitely true because I had two different professors for my Chemistry classes and one used mcdeltaT, and one used msdelta T
thank you
he was in a good mood for this video :)
After 8:06, I was too busy fangirling to listen
We literally did the same experiment today and our Chem teacher let us stir with the thermometer. :D