Thermodynamics: Crash Course Physics #23

Have you ever heard of a perpetual motion machine? More to the point, have you ever heard of why perpetual motion machines are impossible? One of the reasons is because of the first law of thermodynamics! In this episode of Crash Course Physics, Shini talks to us about thermodynamics and entropy. Also, we learn about isovolumetric, isobaric, isothermal, and adiabatic processes. It'll all make sense in a minute!
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[@crashcourse]

We made quiz questions 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/3TW06aP

[@johnangelson6306]

Put this video on 0.75 speed and you'll make your life easier xD

[@mattgabriel2246]

She sounds like a drunk lady talking about physics

[@jackiedim7028]

The fact that i learned more in this channel than in school is weird

[@russianpegs]

I can't believe how perfectly timed this is with my current physics class

[@darthmatoro]

i actually have a thermodynamics exam this weekend huhu

[@Alien_Spores]

synchronicities

[@hammeringhank5271]

+Adam Raza Jung

[@chibiprussia5574]

Physics? I'm learning this in my college bio class XD Well, not all of it :P

[@thequantumguy5067]

your "current" physics class huh? i see wat u did there

[@mirnash1303]

Physics is so interesting when you actually get to know and understand it, I really want to sue all my school teachers for not doing their jobs correctly and for only scraping the surface when it comes to Physics, it really is just so frustrating when you are so interesting in something that you can't even understand properly

[@Eliphas_Leary]

First law of thermodynamics: You don't talk about thermodynamics. Second law of thermodynamics: You don't talk about thermodynamics. Third law of thermodynamics: Who's new sweats.

[@TMPChem]

First law of thermodynamics: You can't win. Second law of thermodynamics: You can't tie. Third law of thermodynamics: Eventually you lose.

[@2-dsynctium773]

Third law: you cant quit the game***

[@roslynelisenorman4290]

I love everything about this video. I wish my expensive classes were as entertaining and as cleverly put together.

[@JohnnyYenn]

Doing thermodynamics right now at uni! Perfect timing because i suck at it..

[@andresousa9876]

i had an exam on it a few months ago and only 14% passed xD

[@SecularMentat]

I know that feeling. Physical Chemistry 1 was all thermo. Lots of integrals and partial differentials. Good luck.

[@MrMrjorgeco]

i bet you succeeded !

[@andresousa9876]

+

[@chickennugget6903]

Wait, is thermodynamics supposed to be a uni class? I'm a highschool freshman and we have to take this class D:

[@sosensualandfree]

I've been doing thermodynamics in some way, shape or form for three years now and this has been by far the best presentation for these concepts that I've come across. Thanks Dr. Shini. Lecturers could literally spend two days explaining what she did in ten minutes in class. You guys are awesome.

[@really-quite-exhausted]

This is so helpful! We've been doing thermodynamics as uni but I tend to sit in letcures with my eyes glazed over because I didn't fully understand the basics when we first learned them, so anything more complicated is too confusing.....

[@ConTejasMusic]

For everyone complaining like "She talks too fast I can't keep up..." Read their channel name. Maybe, just maybe, it might explain why :)

[@RobotHau5]

The other videos aren't as fast and hard to keep up with. There is of course an effective way to give Crash Courses, and this series presenter doesn't demonstrate that unfortunately.

[@angelwhalen7599]

That’s nonsensical... maybe she could slow down! There are geniuses on this thread that can’t keep up so your point is moot!

[@Strychninesonics]

@@angelwhalen7599 Geniuses could just rewatch or adjust the speed of the video...

[@aishetri]

@@angelwhalen7599 KZbin provides an option where u can slow down the audio of the video

[@Diaming787]

There exists an option to slow down the video...

[@Vincentoo7]

"In this house, we obey the laws of thermodynamics!"

[@kiasmorningstar]

Loving the series. Thank you for all your hard work!

[@ramsey180]

I am distracted because of the fact that the bulbs are arranged to be exactly around her silhouette

[@aishetri]

Great observation

[@fay7725]

Omg lolll I didn't notice and now I keep getting distracted with the same thing 😂

[@leticiamatsubara7298]

Such a beautiful accent! I could spend all day listening to her xD

[@yogeshgangurde9834]

In love with this channel instantly! I don't even need to run it on 2x. She speaks so fast. Thank you.

[@ampoliros1776]

I'm not one to comment often, but man I get so excited when I see these videos in my news feed. I can't get enough of them. And I'm an upcoming mechanical engineer too. Good work Dr. Somara.

[@totatbtb8147]

this is honestly sooo helpful keep up the good work

[@glcmy345]

watching this after 7 years of it's release, she still explains it better than my teacher. and i even got a thermodynamics test tomorrow and this is just an absolute lifesaver.

[@qendrimbehluli6299]

I love the way she arranged those lights around herself. Very Informative , thanks.

[@Dusan93etr]

Thx for this. .) I have exam next week, this is lifesaving. :) But exam is just "little" more complex but it whould start me up realy good. :) Love this channel.

[@anniev.2641]

Her voice is absolutely gorgeous

[@marklaurenzhandayan5184]

Thank you so much! You made a complex concept understandable for students like me. We will be having a physics exams tomorrow. Wish us luck!

[@leonardmcdonald3928]

Lovely explanation. Although if I was a student cramming for an exam, I would watch this video at 3/4 speed. You surely can talk fast Ms. Shini ( or Doctor Shini I would assume).

[@alex_0170]

Thanks, this video was really helpful, especially for last-minute revisions.

[@Zagy21]

Im so happy that for once i dint have to hear about the messy room analogy regarding entropy..

[@timothymclean]

2nd Law of Thermodynamics for Dummies: Warm things make cool things hotter. Consequences: There ain't no such thing as a free lunch.

[@firelow]

also disproves evolution

[@timothymclean]

William Pereira Gomes If only there was some constant source of energy coming to the earth. I'd love to consider what source that could be, but I'd like to watch THE SUN set. (Come to think of it...it more directly disproves the theory of the origin of beings by birth and development. After all, assorted molecules from digested food becoming part of a person that grows into another adult is a blatant reduction in entropy.)

[@FreyjaTheWarrior]

@William Pereira Gomes: No it doesn't you idiotic pissant.

[@fred321cba]

+William Pereira Gomes Little darling, I feel that ice is slowly melting Little darling, it seems like years since it's been clear Here comes the sun, here comes the sun And I say it's all right

[@Nilguiri]

Yeah because the earth is a closed system, right? It has no energy entering it apart from the sun's radiation--oh wait.

[@ThatAnnoyingBird]

Am I the only one that kept getting distracted by the bird in the lower-left corner?

[@isaackarjala7916]

I thought the distraction was the rest of the video

[@joshbobst1629]

I'm distracted by her eyes.

[@MrGil619]

The distraction to me was the beautiful woman talking..

[@ruchid758]

I saw after reading your comment 😂😂

[@matts5247]

Mistergamer9892 what bird? Who should get medicated if something that 99.999% of people don’t even consciously notice is actually “distracting” to you lol

[@SPI828]

Currently studying Bas Gas Turbines for my ATPL and this was such a great help

[@MaArgileroart]

Uou. I'm not good with Physics, but I think I understood about that topic. I'll watch again 😆

[@larryboy2222]

I'm taking Aerothermodynamics right now. This definitely helped

[@athok98]

In an hour I'm writting test in thermodynamics sooo... perfect timing CrashCourse :D

[@sarahgriffith1424]

I'm in a fourth-year university class on geothermal energy. You are helping me save my butt!

[@jennalippe2737]

Thank you for this video! I am taking thermodynamics 2 right now and this is honestly a great review of all the basic thermo ideas!

[@shawnputh9245]

Jenna Lippe Hi I m a great fan of ur videos

[@shawnputh9245]

Jenna Lippe I need to know more about girls

[@anamacias9081]

I love physics but my school's program sucks (I get 120 minutes a week), there is no extracurricular options to learn more physics and I can't afford private classes. I want to become an engieneer someday and your videos are keeping that dream alive, thank you!

[@Anonymous-yb4yh]

very thankuuuuuuuuuu mam for such outstanding explanation . will you please provide more videos related to thermodynamics . Anything else you want to suggest along with watching your videos for having and experiencing physics behind everything . again very thank you .

[@roninscholar]

Haha, think faster..or hit the pause button. Dr. Shini Somara, very, very nice. I am now a fan.

[@Sandy-oy2lr]

This is a subject so few people understand. Glad this video exists. It explains much. I took physics, but, I watched just to bone up a bit and see if maybe I missed anything. Mostly, I just forgot a lot with, well, age atrophy....sigh...

[@markornido]

@7:12 this is the portion where others misunderstood the 2nd Law, glad that she pointed that out.

[@Z3RO_TN]

Naise~ It summarized everything I have learned~ 😃

[@mariacastro6754]

The quickest I’ve been able to see a video after it gets uploaded!

[@TheScienceCube]

Nicely done! and guys, this is crash course so don't blame her for speaking fast :)

[@Ngamotu83]

That explains why Homer Simpson's reliance on the drinking bird to keep pressing Y on the keyboard didn't work. There has to be a small amount of energy exchange at the beak to keep the bird bobbing.

[@bluejay4703]

YUS NEW COURSE!

[@pokoirlyase5931]

What i understood : There is a probability higher than 0 that the shattered cup may come back as a whole .. What this means is that time movin'forward is an illusion made by the probabilities and our short life span (universe wise)

[@bhav_kr4097]

Adding graphics spiced up the things I'm so loving it it's better than physics class

[@ChundomanX]

best course ever, i love the presentator

[@theonionpirate1076]

Other question- in the isobaric process example, it seems like the gas cooled when the piston was pushed down. I understand that in the equation, a temperature decrease would balance a decrease in the volume of the container. But, by what mechanism does this happen? I can't figure out *how* decreasing the volume would cause the gas to cool. It seems to me like if anything, doing that would actually cause the molecules to move even faster, although to an imperceptible amount. And after all, as she said, we're doing work on the system, so unless there's an exit for heat, wouldn't the internal energy increase? Would pushing the piston down not just raise the pressure of the gas in an inverse ratio to keep the left-hand side of the equation of equal value?

[@luyandalamula9009]

Lord bless the whole team of crash course. Thank you so much, understanding is key and you guys make it fun and understandable :((((((((( THANK YOU

[@shironegisama]

Love this knowledge!

[@OmegaBlack85]

Nicely done!

[@chrisz3r096]

Y’all so goated

[@ivelinkarageorgiev3111]

awesome editing !

[@tokasherif2515]

explaining physics like a pro mashallah love u

[@xyoungdipsetx]

Love this channel

[@swapnilpatil8117]

Crash course is very helpful to increase understanding speed

[@pareshpatel834]

What an knowledgeable attitude you have I love it it’s simply amazing

[@CCcrafted]

I once kept one of those birds going constantly for over a month! Just every 2 days or so I refilled the 'dunking' cup and it kept going 😂 In the end a build up of minerals on the beak of the bird basically prevented the beak actually coming into contact with the water :')

[@siulseyer8053]

I simply adore gorgeous physicists

[@rashmika9742]

"Dinner is coming" was such a cute reference inside that freezer. :)

[@samantha-tw3jl]

Awesome videos!

[@ElonMusk-FanZone]

i

[@SmartShootersLLC]

This was awesome

[@kingtriplebbb5347]

Grrrrrrrrreeeeeeaaaaaaat great!!!!!!!!! Thank you so much 👍👍👍👍👌👌

[@anvisamanta7606]

this is love ♡

[@boooooster17]

Great Video

[@cpg2443]

such an amazing channel

[@soulassassin0g]

Homer: "Lisa, come in here please?" Lisa: **enters the room nervously** Homer: **pointing at the perpetual motion machine she made for him** "In this house we obey the laws of THERMODYNAMICS!"

[@abaundwal]

Amazing!!

[@Ihsan_almohsin]

thank you very so much

[@donalgannon6426]

Does crash course still ever do history videos? I really liked those

[@onetwo8994]

Change the playback speed to 0.75 and turn on the subtitle. Makes it easier to understand!

[@noone-bp2iv]

0.5 HAD TO DO.

[@TonytheTaiwaneseTurtle]

Now come the best part of physic!!

[@lindsaymacleod6750]

Thank you!

[@mercedesmcelroy5949]

Why is it that when my college professor explains this, I don’t get it but when I watch a crash course I’m a genius about the subject afterwards

[@anush7386]

So awesomesssss crashcource

[@areamusicale]

You are awesome !

[@khandarwilliam5439]

this channel has taught me more than my whole school life

[@spacepopeXIV]

Just like everyone else who says that. But I don't know, maybe you went to a shitty school, so I'll leave it at that.

[@BariumCobaltNitrog3n]

No it doesn't. This channel only provides examples and details of what you already know. It clarifies, not teaches you new information. What is energy? What is work? What is heat? What is a system? You should learn all the info in this video in school, this is basic stuff. Unless you are 5 years old. r u 5?

[@alireza1078]

@@BariumCobaltNitrog3n is he 8 now?

[@ours1468]

U R Awesome thank you!

[@rubikfan1]

this might be the most inportend lesson if you want to understand the universe.

[@coder0xff]

Which is more than you can say for spelling and grammar.

[@abikochin2462]

.....

[@Willy-nu3oc]

+Brent Lewis typo Maybe?

[@unvergebeneid]

Willy *Typos maybe?

[@raphaelaubry5013]

great vid

[@damisimsanii544]

i love this teacher

[@notknot12knots]

Know what would help a lot with remembering all these sci-ency words? An understanding of etymology of Latin and Greek words of course! You could drop some of that knowledge in the Crash Course Lin-guist-ics course you should do! Pretty please.

[@CHeCHoResilienciA]

thanks a lot!

[@wkeil1981]

i was gonna watch this then i heard and saw you. gonna watch another video on this subject

[@ramnarayansir2342]

this is the real teaching

[@FrostIceAndFire]

Came here so I could fully understand The 2nd Law songs by Muse

[@lenlaegrim]

I listened to Unsustainable whilst studying thermodynamics. Singing it in your head during a test is quite effective.

[@Pitazboras]

Well, about that... I was let down by those songs because they got the science and reasoning wrong. The whole idea is summed up by this part: "In an isolated system, the entropy can only increase / A species set on endless growth is unsustainable". Well, first of all, in an isolated system *any* process doing non-zero work is unsustainable, endlessly growing or not. But more fundamentally, Earth is *not* an isolated system so the whole premise is wrong.

[@IABITVpresents]

They just used the 2nd law as a way to point out the corruption of politics and the chaos they cause. "In an isolated system (corrupted country that refuses to open up), entropy (chaos and disruption) can only increase." Rather than the entropy itself.

[@linacarol7344]

OMG! I couldn't understand. GZ!

[@OlyPhoenix86]

I love it

[@Jasonsmith-sr1ke]

This course is the bane of engineering students at my school.

[@aadi.p4159]

reeady mei'd i wish i had profs like u

[@manojsaravana3877]

thank you

[@nataliagomez182]

After 1 year from my physics course, I'm here for my thermodynamics course (:

[@charlesrollins4154]

have you done a video on the zeroth law?

[@ganaraminukshuk0]

I bet I can guess what one of the next episodes is going to be about: heat engines and heat pumps, with possible tangents to refrigerators, air conditioning, steam locomotives, and hurricanes.

[@stellar8689]

It's likely just me, but for me, it feels like her lessons are concerned more about giving the 'law's and rules to remember rather than logic/common sense to describe it. Then again, I self-taught physics in high school and this is basically my first time getting lessons from someone else (in uni for physics now :) )

[@aishetri]

Love u Doctor

[@pareshpatel834]

Absolutely genius perfect

[@jasminnyack1724]

The things in the freezer "dinner is coming" etc made me happy

[@slushii5492]

Crash Course Math please? and 7:25 OVERWATCH?!

[@ganaraminukshuk0]

If you pause the video fast enough at 7:21, you'll also see Frozen. Don't ask me about the shaving cream; I already know what comes next.

[@Pikachu12321100]

from left to right: Frozen, Jurassic Park, Overwatch, Game of Thrones

[@carthius]

it's b/c she is Symmetra

[@chewyshoey]

Yeah I really doubt that crash course math will ever come out. This series is unfortunately doing terrible when i comes to view count.

[@AJarOfYams]

That ice is "Ready Mei'd" :D even outside the game she is the queen of puns