Enthalpy: Crash Course Chemistry #18 

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"Haiku's are easy, But sometimes they don't make sense, Refrigerator." Awesome shirt.

i love how he says "if you were paying attention, you learned" knowing full well half of us zoned out and have to re watch it

Learned more in 11 minutes than in 2 hours in lecture for Gen Chem. Thank you

Hank's Law: 'The number of Crash Course videos watched is directly proportional to the grades on the chemistry test"

When you gotta teach yourself because of COVID-19

Enthalpy @ 3:10 Calorimetry @ 5:30 Hess's Law @ 7:20 and 8:20 and 9:15

I love what you do! But, this time a few errors slipped in, so let’s correct them: Two things: 1st thing: @7:22 you have a slide that lists the Standard Conditions: T = 25 °C C = 278.15 K P = 1 atm = 103.25kPa That is a slide with a couple of whoopsies, that mainly look like typos in the temperature, it is split on two lines and 273.15+25=298.15, not 278.15 in the pressure 1 atm = 101.325kPa not 103.25kPa What I think the slide should have said is: T = 25 °C = 298.15 K P = 101.325kPa Sidenote: there are several standard conditions, the one referred to in this video is SATP - Standard Ambient Temperature and Pressure, but I can see how this distinction is unimportant for this video. 2nd thing: @10:16 Hank says: “All that energy locked away in chemical bonds and then released as heat to my aching frozen fingers.” I have to take issue with this phrasing, as it perpetuates a common misconception, that energy is stored in bonds; thus, breaking them releases that energy. That last part is not the case: Breaking bonds require energy. Forming bonds releases energy. If you look at the reaction equation @9:22 4Fe+3O2->2Fe2O3 you can see a net gain of bonds. While all bonds are certainly not created equal, the heat to Hank’s hands comes from the formation of bonds between iron and oxygen, not from the breaking of dioxygen bonds or metallic iron bonds, unfortunately his sentence implies otherwise. I am aware this video is over 4 years old by now, but I still hope it will make it to the CrashCourse people. If you are not such a person, and still read all this, please like to increase the small chance that it gets seen.

These videos aren't the reason I'm passing chemistry. They're the reason I have an A in chemistry.

well...midterm tomorrow. all i can do at this point is ask for prayers, friends.

who else is cramming before assessments?

Hank I have never loved your nerdy face more than I do right now. I've been cramming for this Gen Chem test all night and you have probably just saved me from myself. I owe you buddy.

I had 4 lectures on this stuff, 2 seminar sittings and spend about 4h trying to understand this with my notes and textbooks. And then i watched a 10 minute video and am wondering why everyone explains this so complicated in the books and lecturs! Honestly, if I pass this exam tomorrow, its only because of crash course! It is so satisfying to actually understand things!!!!

after watching this i feel like youtube is gonna help me through my university studies. very helpful and it gave me a motivational boost of interest to keep on studying! thanks!

fuckin fight me Hank green I'm gonna grow up and find the volume of the goddamn ocean

I just discovered this channel, and this is probably the best lecturing i have ever seen. I think this is how lessons should look like even on colleges and universities. The fun stuff is what we need at classes, the rest we can read in books. Enjoyed it and looking forward to exploring the rest of the channel.

If I discover a scientific law I might just name it Hanks law.

I wish that one day some brilliant student who learned Chemistry through your lessons would discover a new law and name it after you. You really deserve it Hank..... U must be a genius for explaining us chemistry through 10 min videos which our stupid teachers couldn't do in hour long regular lessons

6:48 , when you were like "not bad", i couldn't help but laugh at that part.

Thank you for explaining the correlation between delta H and q. I didn't understand it from my textbook and I needed it for homework. Hank, if you are reading this, you and your writers are amazing and thank you!!!!!

and the newly discovered element with atomic no.119 has been named Hankanium

I'm sad that there weren't any dollar bills flying out of the banana stand. There's always money in the banana stand.

This account is like a gift from the heavens. I honestly downloaded the all their videos, whether or not i have the course or not. It's fun to watch and at the same time very very productive

Please do some physics crash courses!!! I really need it 🙏

Crash Course coming in clutch during finals season! Thanks Hank!

I love the arrested development reference. And I love the video. This whole thing is just really good. Especially as a recap for finals. Thx guys

Hank, I wanted to let you know that you and John here at CrashCourse have helped me. With your abundance of (long) videos, I'm not only learning by listening in at random parts, but your voices help calm my anxiety and it's basically like listening to calming music for me. Thank you! xx

Thank you, thank you. What my instructor could not communicate in two hour long lectures, you made intuitive in less than fifteen minutes. Bravo sir.

I swear....learned more stuff in 10 mins than 100 hours in lectures!!! Hats off to #crashcourse (y) !!! Ye are just freakin' awesome!!

Since my final is this week, Enthalpy is a friend I am going to try very, very hard to understand...

Wow this is ridiculous. I am a high school student and I have a few friends who study chemistry (and I don’t I study physics), I remember that a few weeks ago they had a test coming up, we were in a classroom, and they were on the board writing equations. I had no idea what they were doing, but now I do they did this calculations this is ridiculous with a few episodes of crash course chemistry I understand in chemistry about as much as a few friends of mine understand from studying it in school for a year and a half. Thank you Hank I’m so much smarter because of you.

I wish so much that John Green would be my AP chemistry teacher

"IF i am reckless and insane"? Why is there an IF there...

Hank: Explaining stuff about enthalpy Me: Trying to read this T-shirt XD

dude you're the coolest scientist and best teacher I've ever listened to. Congrats and keep up the good job!!

Why does this channel not have more views? These are all so amazing!!!

Chemistry = Confusing fun stuff. :)

Thank you so much for these videos. Totally helped me study for my AP chem exam!

I'm so happy that you're not afraid to use formulas in your videos. I'm gracious for the trust towards the audience.

...and I thought I knew everything (or just enough) about enthalpy and thermochemistry. I'm surprised how many new things I actually learned from this. Great vid as always!

You are hilarious and just brightened my day of studying! Loved the "Can I just go look at pictures of cats now?" !!

thank you!!! this is so useful for my AS Chemistry

This video series allowed me to understand everything I missed or forgot in AP Chemistry back in high school three years back. Cool!

I love all these videos, the science I learn in school only focuses on the basic rules and doesn't explain why the formulas work and it's frustrating. With Crash Course, I can grasp it better because it's not just a bunch of numbers, letters, and symbols. Also, I have that shirt, and my English teachers love when I wear it.

AP chemistry stresses me out

Shout out to Michael Bluth's Banana stand...

Excellent Video . I was struggling with this enthalpy for over a couple of years And you just make it clear in 11 minutes Thankyou very much

Thank you! 11 minutes watching this was so much more informative then my 3 hour lectures! Maybe we should all give you guys our tuition!

loved the arrested development reference

Haikus are easy But sometimes they don't make sense Refrigerator

Great episode. My physics professor never bothered to get the idea of enthalpy across which made thermodynamics harder to figure out. You cleared that mist that surrounded enthalpy. Thanks a lot.

I just want to thank you and the crash course team for making my high school chemistry tests not that fearsome.

ya im definitely gonna fail chemistry......

"Today we shall answer it! Kinda!" Hank has the best quotes xD

This videos are wonderful Hank. It's a great reminder for a Chemistry major over the summer.

Ive started watching the biology course today and I'm 15 videos (lectures) in. Awesome videos, awesome course and sufficient information provided. Thank you crashcourse.

Watched this in AP Chem today, aw yeah.

"can I just go look at pictures of cats now??.,/,./" Hahahaha Hank knows his audience

You guys are incredible. I love your videos! Sometimes I struggle to find the playlist any given video is a part of. If the content blurb under the video had a link back to that playlist, I'd probably watch Crash Course more exclusively.

This video is epic.I learned a lot.This is the reason I got an A+ in chem.Loved it.Thanks bro

The kelvin you used for the standard enthalpy is incorrect. Standard enthalpy is 298.15 K not 278.15 K.

Thank you so much for putting the bluth banana stand

Really helpful. You make me feel more interested to study chemistry. Thank you very much!

So I'm a ceramic artist an I typically fire with wood. I am taking all of these videos and using them to better understand why and how materials respond the way they do in such a volatile atmosphere. Keep up the good work.

All I could think of when he said "Better living through chemistry" was "Better living with Collins and Collins"

Can you please make a video where you explain all this as if you were talking to a five year old? Asking for a friend.

that was almost a perfect summary of the second half of of my Thermo II class in Mechanical Engineering. well done sir

You're the only reason why I know what's going on in my chemistry class. Thanks so much!

How'd you know that I was distracted and wanted to look at pictures of cats :O

I needed this for AP chem...ugh.

Cramming 2 minutes before the AP test. This is the epitome of life. Thank you school system.

Cara otima iniciativa, eu sempre quiz ter esses videos legendados pra poder mostrar aos meus amigos q nao entendem ingles muito bem, parabens.... vc ta fazendo um trabalho foda heheh

At 7:24 seconds the temperature in kelvin is not correct. The video is really helpful. Keep up the good work!

I am sure this has been said before somewhere in the comments but at 7:22 it should be 298.15K (not 278.15K).

This video has finally answered to me where the pV term in the equation for enthalpy went. Thanks!

This is by far the best explanation of enthalpy and state function. Better than textbooks!!!

Can you do some more high level chemistry videos (some relating to the AP chem curriculum) Thank You!

Theoretically, would placing the substance in a vacuum mean that the enthalpy of the substance would only be made up of its internal energy, as no energy is required to displace the air particles (VP)?

I use these videos more than my Chemistry textbook. Thank you so much.

Dear crash course, I don't think you know how much help this is. THANK YOU SO MUCH FOR THESE VIDEOS

Hello Crash Course team and everyone behind this awesome project, I just want to let you know that I've tried to contact on you for having permission to create portuguese subtitles for some episodes and since I got no response, I got a little ahead of myself and began to do it anyway. I want to apologize and want to let you people know that I'm trying to credit you everytime. Well, that's what I wanted to say, if I'm doing anything wrong let me know and I'll take down the videos. Best wishes, me

AP Chem kids wya?

This video FINALLY helped me grasp the concept of enthalpy after about the 2nd or 3rd view. THANK YOU!!!

Im so glad my chem teacher found this channel since watching these vids before class is now our homework

You lost me after the banana stand

Do Organic Chemistry!!!

I'm gonna have to watch this one again. I thought I was keeping up pretty good, but you totally dropped me with this episode.

In the final moments of my MCAT preparation, your videos are great concept reviews. Set the player to x2 speed and we have the quickest reviews yet.

Its good advice but can you slow down please, Would be appreciated,

Dear CrashCourse people I think you made a mistake or 2 at 7:23. If I am not mistaken it should be: C= 298.15 K and P = 1 atm = 101.325 kPa. I know it is not a huge problem but maybe people get confused.

You make me laugh and smile and love learning. Your videos are fantastic. Thank you for doing them.

I needed this for my chemistry exam, Hank. Which was this morning... When this was uploaded... I'm crying.

Chemists be like: What should we use to represent heat? I know a q! Ok, what about Enthaply?... an H!

25C =298.15K not 278.15K

This made me understand my chemistry lessons so much. Now on to entropy!

This helped me understand something that has confused me since high school science (20 years ago), Thanks H!

Arrested development, bluths banana stand

Do a crash course physics series

I have an engineering exam tomorrow and I was just revising this as part of my biology and chemistry course. What a coincidence this happened to be in my subscriptions box.

You're a wonderful man, sir. Thank you for these videos