Partial Pressures & Vapor Pressure: Crash Course Chemistry #15

This week we continue to spend quality time with gases, more deeply investigating some principles regarding pressure - including John Dalton's Law of Partial Pressures, vapor pressure - and demonstrating the method for collecting gas over water.
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
Table of Contents
Theory of the Atom 1:48
Adding up the Pressures 2:34
Mixing Vinegar & Baking Soda 7:15
Collecting Gas Over Water 8:54
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[@crashcourse]

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

[@rhymeswithorange3]

My favorite thing about Hank is that he gets so excited about STUFF. He seems sometimes like that one kid in high school biology who loved learned about awesome stuff. That kid was always my favorite kid...He was also usually my best friend...

[@xGravitifyz]

Avogadro, Boyle, Charles and Dalton all came up with gas laws. ABCD. Coincidence? I think not.

[@misspurdy27288]

Desmond Ong and edison

[@aaronsilvera177]

Boyle didn't come up with his gas law

[@ridheesh4765]

Desmond Ong you forgot Henry

[@nexuswolf780]

aaron silvera Further proof of the conspiracy, detective Silvera! Boyle didn't even come up with it, but it was he who got named after it. The ABCD gas laws... *It's a conspiracy.*

[@liamguardia6091]

Nexus Wolf koo

[@Scerttle]

Michael's expression when Hank says "exactly about" XD

hahaha

[@AndrewGulickTrueVitalityPlus]

Well, he is not holding the graduated cylinder exactly vertical , he is holding it about vertical. Therefore the answer is in 'Exactly Abouts.' ;-)

[@earthstar5673]

ikr XD

[@Valpau95]

So.... is he always under the desk?

[@ProfessorSyndicateFranklai]

I think that's where he hosts sci-show from.

[@theCodyReeder]

I prefer to collect gas over mercury since its vapor pressure is about 1/8000th that of water.

[@Waterflame]

8:55 A wild Michael Aranda appears! I love Michael's face when Hank says "we have collected exactly... about..."

[@onthelongestroad]

I love how the friendship between Michael and Hank is so obvious. I can only imagine there were a lot of outtakes of hysterical laughter during those scenes!

[@michaeloyesiku]

For you to be able to explain Daltons law with such a level of simplicity, You're a GENIUS

[@lucascampbell6350]

Don't you ever take a breath between sentences? Seriously though great stuff.

[@misspurdy27288]

Lucas Campbell no. He doesn't, he breathes while he speaks.

[@jwilds3034]

Dear Hank, Thank you so much! I have put off my AP Chem homework all summer because I've been busy all summer (Serving the homeless in MS for a month then a summer camp) So I was panicing, but you have managed to calm my nerves and help me! THANK YOU SO MUCH!

[@eagleontheweb]

Michael's face when Hank says "we have exactly... about..."

[@kimeiga]

0:28 I'm not sure if that's how five-year-olds dance, Hank.

[@huhufbez]

hey listen what he say about partial pressure ,don't say useless things

[@Lemenks]

I am really impressed, I'll make sure to tell everyone I know who is learning chemistry (highschool of course) about these videos. Teachers teach this every year, the same stuff again and again, so often that they give up caring (mostly). You on the other hand, make one only video and really pack it with a punch, brilliant for everybody learning this for the first time. Honestly you are going to go down in history for one of the first people on youtube to aid equal learning opportunities for all

[@whitewolf316]

Omg one of the forest spirits from Princess Mononoke was at the birthday party! That makes me so happy lol. Incredible video crash course, I learn so much from your channel, keep it up Hank! -you too, lovely assistant who lives under the desk. Good job.

[@kaylab9435]

The Cosmo Kramer painting on the wall in the background of the beginning animation made me smile :)

[@LOTRLEGOLASFAN88]

*It's my party and I'll cry if I want to *

[@katerinacerna8555]

You would cry too, if it happened to you.

[@akemi-de-lol]

You like Melanie Martinez? Me too actually.

[@katerinacerna8555]

@@akemi-de-lol Nooo, its Leslie Gore. At least for me.

[@akemi-de-lol]

@@katerinacerna8555 Huh, which song was that? Cause I think I've heard of her before. As for me the song is Pity Party by Melanie Martinez

[@katerinacerna8555]

@@akemi-de-lol "It's my party" a 60s song by Lesley Gore.

[@hackprefect]

Michael's face when Hank said "exactly about" matched mine. I enjoyed that.

[@alexbr82]

Thank you very much Hank, your explanation rocks! I'm currently using it in research form thin film deposition parameters.

[@shubhraagarwal9250]

This video is absolutely perfect for my high school chemistry syllabus! not too much not too little. Thank you, Hank!

[@motidoc]

I REALLY ENJOY THESE VIDEOS! One time I dozing off on my course material over long drowsy calculations and the next I am laughing my head off at this awesome animated sci stuff!

[@KeeperofToast]

0:30 0_o That party must have been... interesting

[@julkarnainadnan6885]

Can you believe it was 10 year's ago and still that beautifully explained with animation !!

[@XxSeparatexEntity]

Thank you SO MUCH for all the analogies and visuals!

[@bexinterrobang]

That little grin that Hank did when Michael disappeared was unreasonably adorable.

[@bobkerman3015]

He wasnt an English Teacher he was just an english teacher.

[@lem1738]

The E in the second « English » would be capitalized too since it’s his nationality. The only way to tell the difference is the context.

[@TheLocoUnion]

He was British.... oh I ruined the joke! Sorry!

[@KatherinePierce_81]

He was a brit that’s it kiddos

[@scargmedia1861]

Three years too late, but... Linguistics graduate here. It's actually even more confusing than that. He wasn't an English teacher. He was just an English teacher. /ˈɪŋ.ɡlɪʃ ˈtiː.tʃə / vs /.ɪŋ.ɡlɪʃ ˈtiː.tʃə / Stress - it matters!

[@oisforoctopus3119]

i really struggled with the equations but this really broke it down for me! thank you so much! :)

[@navalingle6954]

+O isforOctopus : whos you kitty.....?...

[@becca7106]

These videos are fantastic!! Thank you so much!

[@FilibertoRafaelZuritaAbad]

This is the best vid of CrashCourse i have seen so far.. Loved it. It's hard to not learn with you! Thank you so much :D!

[@marilinalang5900]

You make chemestry so exciting! Really thanks for all your videos 😄😄😄

[@BatGuy500]

Thanks a lot. I thought it was much more complex. This helped.

[@MrMoustacheNinja]

For some reason I always imagined Michael Aronda was an older bald man lol. Crazy to think that I've been watching him on sci show this whole time lol. Great video btw!! Helped me way more than my chem professor! Thanks!!

[@daniellbondad6670]

He is Hank's best friend among strangers(it is John who is Hank's among family).I have best friends too among various places such as among extended family,among school and some animal friends among streets.

[@MattSarahJamSessions]

@Shara: R has different values depending on the units you are using. Because Joules and calories are different and atmospheres, Torr, and Hg are all different, the value of R that you should use when dealing with gas equations depends entirely on what units your data is in (or you want it to be in, and change it to through dimensional analysis). Hope that helped!

[@Stmartha1039]

Once again, thank you Hank for helping me pass my Chem Lab Final =D

[@firebirdies]

When I first started, I had to rewatch some videos and thought I was dumb. So relieved to see other people doing the same thing!

[@latropajaleosa]

This was very good. Thank you sooooo much for the simple experiment!!!!

[@ItoeKobayashi]

So happy to see Michael!

[@carolinaferreira3187]

Thank you for your awesome videos! They have been useful to me, ever since elementary school :-D Your videos, at that time, opened my eyes to the big and complicated world of science, and for that I am extremly grateful :-) Thank your for inspiring young people across the globe; to ask questions and learn more about "how it all works" :-)

[@elle-ls7ks]

you have a very nice presentation HAHA j'adore. you make learning more interactive and interesting lol

[@TheSupo123]

1:58 John Dalton is an Aristocratic green Harry Potter

[@richakapur2119]

Amazing video understood everything I'm a fan of your speaking style

[@Sicosico]

This for sure isn't the first time someone has said it, but that intro... I love it :D

[@LOG4NAT3r]

I love these videos so much! They are going to help me "study" for my Chemistry Placement Exam! Thank you Hank! (:

[@Oberonjames]

I love how you show the camera the side of the tank that's clearly labeled with the volume it holds and then ask us not to comment on the exact volume of it.

[@drewliedtke2377]

More experiments in future videos! This one was great!

[@Matt-pr1xv]

Michael's reaction when Hank says "exactly about" is perfect.

[@Suchy1213]

I study chemistry. It's wonderfull, that you guys make it easier for many to understand. Thank you.

[@joeleldo5064]

I'm fond these fantastic chemistry videos. Pretty funny and cool

[@fuzzylumpkin8030]

Putting this one in my favorite

[@davescave7267]

As a future teacher i am not sure how much of this i will need for elementary school but i look forward to trying

[@strawberriesandpeaches9816]

Thanks for making this easy to understand!

[@moniqueftp]

you just take my passion for science to a new level and i love you for that

[@UniversalSleuth]

The ridiculous metaphors really are just fantastic(!).

[@nichtsPersonliches]

Great video - especially the beginning.

[@WarpedReality89]

Also, at 9:20, the look on Michael's (sp?) face when Hank says "We have collected exactly... about..."

[@radagastwiz]

Henry Reich is showing up more and more in Missoula stuff. I am getting more and more excited about this.

[@radhamanithangavel7321]

That analogy's great by the way !

[@funkyhippo123]

Hey, i have a test on this tomorrow! Thanks hank!

[@Thunderwalker87]

In high school I had a terrible chemistry teacher... Thank you Hank for proving that Chemistry is not only comprehensible but again that my high school chemistry teacher was terrible at his job.

[@romantheflash]

I'm finally understanding Chemistry....WOO!!!

[@CatacombD]

I'd like to think that Hank's lab assistant has always been crouched behind that desk, with that same smile on his face.

[@Jonafridge]

This entire series is just going whumph over my head

[@oa3255]

Kramer painting in the white house..... love it!!

[@ChickenNuggetSquad11]

That analogy was amazing

[@extreamenoobnoby8830]

The way Hank says "BUBBLES" at 9:07, just magical.

[@bobjasom5488]

I like the reference to futurama in 1:15 The heads in a jar!

[@danielbielinski4268]

I feel so smart after understanding these videos

[@KDG702]

I sure do love cramming the day before the AP chem exam....

[@ilykefrychickenguess]

haha the way zach popped up and "you can go away now":) all that creepy smiling

[@powhatanpotts9076]

That was funny when he appeared under his desk. 😂

[@mwheeler1994]

I love the crash course animations.

[@Ramian1]

yeah at 9.21, thats epic, cheers Michael :)

[@awesomest230]

Why did Voldy scar John Dalton's forehead, Hank?

[@avijitdey992]

rodaynah Voldemort did that

[@edgelordofmordor]

avijit dey I guess voldy is an abbreviation for Voldemort, Sherlock

[@voldemortsnose7336]

@@edgelordofmordor lol

[@adamlone3271]

@@edgelordofmordor now thas alotta damage.

[@vkkkrishh]

thankyou for helping me understand these things!

[@Adnan-lt5rn]

Thank you very much Mr. Green.

[@tuseroni]

9:18 michael's face when hank said "we have collected exactly about(...)"

[@curtisevans7]

great analogy!!

[@oafkad]

That was the best surprise.

[@Gonzie301]

Best thing I've ever seen.

[@HerTheOneAndOnly]

"it's my party and i'll cry if I want to"- Gotta love hank

[@karenmetcalf3079]

When you make the Carbon Dioxide with the reaction, there was already regular air in the bottle and the tube, so wouldn't it be Carbon Dioxide, water vapor and nitrogen and whatever else was in the regular air in the graduated cylinder? I don't understand how you can calculate for just water vapor and carbon dioxide. Were you simplifying things, or was there some way you didn't get any of the regular air in the graduated cylinder?

[@romantheflash]

Cool, thanks for that clarification, I never really understood Chemistry in high school

[@earthangelbaby_]

Exactly.. About.. almost exactly.. xD

[@ProfessorNogginify]

This should, be done hopefully for my ap Chem exam next year

[@ThatLittleKitten]

This helped so much thx

[@kh1354]

OMG this series just got better. A+/10 trolling by the graphics department

[@jollyjokress3852]

really cool! Thanks a lot!

[@cacksm0ker]

"The Kramer" AGAIN? Man... whoever illustrated that really wanted to work that into Crash Course.

[@thakuriprataps]

Keep the good work

[@blackbite50]

OMG I totally saw that futurama head in a jar reference!

[@AlesiPanic]

I'm making teachers to let us watch this in class... You're awesome

[@beccax321]

The opening room scene reminds me of Gatsby

[@lauraj4435]

Brilliant, thank you x

[@quadconjures]

That was probably the most tension-filled episode ever.

[@Onebadterran]

Oh Michael. How you make me chuckle

[@silvekin]

THANKS YOU I LOVE THIS!

[@RedSoulYo]

Brilliant intro.

[@shubhaankarsharma]

thank you this was super helpful!!!

[@gabehowe]

you said that twice

[@shubhaankarsharma]

@@gabehowe ok got it thanks

[@MrTeeson]

Not bad! Making uni 1st year chem easy to understand :D

[@yusefquinlan8279]

Another interesting video.