Work done by isothermic process | Thermodynamics | Physics | Khan Academy

[@desertman2008]

im doing second year Chemical Engineering and this guy teaches much better than most of my tutors....Thnx Sal, you Sir deserve a Noble Peace Prize!!!

[@acebuck9320]

I'm taking a 3rd year thermodynamics class for mechanical engineering and I still appreciate this videos haha

[@Enthalpy--]

It's for High school student. Lol

[@dancedance182]

Oh. He has 3 degrees: a BS in mathematics, a BS in electrical engineering & computer science, and an MS in electrical engineering and computer science. Total beast. (all 3 degrees from MIT)

[@jessicahdz133]

Wow, why can't all professors explain it this way and save themselves the trouble of having to re-explain it to hundreds of students during office hours? Before this video, the words "isothermal and adiabatic expansions" freaked me out. I'm much more comfortable now. Thanks so much :)

[@balders187]

This is a life saver! why cant my physics teacher make it this simple!!!

[@khanacademy]

yes

[@williamlowry8809]

yes

[@short6599]

yes

[@saadrehman362]

yes

[@ramchandrasinghdhaka3274]

Yes

[@HorizonSpeed26]

yes

[@Peter_1986]

Most of my exams so far I have managed to pass by exclusively watching KhanAcademy videos. xD

[@ilyrican]

Man you're a genius. Not for knowing the subject so well, but for knowing how to explain it simply enough so others can actually understand it.

[@sriram-zn3ic]

Saved my day

[@MyExtremelyOversised]

absolutely amazing man thank you, after hours of searching the internet and reading my class notes and textbook i found this video and it made it so clear.

[@y4ip2288]

boyyyyyyyy, you are awesome. Can't tell you how helpful your videos are. From my end all you get is a like for each video and a lifetime subscription.

[@fiessehabh1]

Thank you Sal Here a Q Removing the pebbles is little confusing Is itnot that the work done is against the load ..also the Q added will do the work..

[@AymanRSaleh]

What did you go to school for? I've seen that you have videos about economics, chemistry, biology, and now you're doing thermodynamics. you're like a human wikipedia.

[@forza122]

I'm a 2nd year Biomedical student and this was very usefull :) thx for the effort put in to it!! And I actually loved the calculus part, it really cleared things up for me! SUBSCRIBED!

[@sweeteuphoria333]

i get it. it hadn't been explained to me with the reservoir. makes more sense now.

[@HorizonSpeed26]

Thanks for the video it was very helpful.

[@isteakahamedimon]

Mind blowing explanation on isothermic process.

[@xWHITExEAGLEx]

E would also take into account gravitational potential energy and the kinetic energy of the whole system from a different reference frame. For example, if you have a jar of gas, the internal energy, U, of the jar of gas doesn't change if you raise it a metre or accelerate it in a car to 60 mph.

[@ventjemazzel8822]

The man can teach! God bless you!

[@calistatantya8588]

Can you also do isobaric and isochoric processes too? Please?

[@hakeemnaa]

you are the best teacher ever you teach in way that all things all science combine tougher i like the part of drawing isothermel process and how the curve is like 1/X think you too much

[@davidrobe10]

Thank you very much, your a great teacher!

[@hobinsmith2611]

very intelligent..thanks a lot

[@yusufalmestiri6821]

n = number of moles not number of molecules. Thanks

[@sciencenerd7639]

Amazing. Absolutely amazing.

[@KgotsoChabangu]

I was really looking forward to calculations..*Im dead*

[@juahnful]

so, in isothermic system, delta U is zero, but in adiabatic system delta U is not zero? also, can a system be both adiabatic and isothermic?

[@tjiptojuwono6865]

Nice explanation!

[@cel4ever09]

Thank you so much, I totally got it now. thnxs

[@vortyx090]

Thank you very much...!!!!!

[@vijayveriyan9555]

Gems are here ..then why are others searching for some dumb explanation?😂sal all-time favorite 😍

[@robertotwell3152]

Khan, should not the formula to determine the word done for the rectangular hyperbola equal (-)of the integral of PdV which results equating to nRT x ln(V(initial)/V(final))?

[@chamika888]

how to calculate work done by Adiabatic processes and final P,T ???? help

[@jereldc]

This was quite demystifying of an otherwise complex concept

[@longhuynh5494]

Thanks King

[@s.gayathri2557]

thanks!!!!!!! :)

[@gayar4596]

Is there something as an irreversible isothermal process?

[@Fridalini]

khan my hero

[@balajvinoth]

isothermal means constant temperature

[@ull893]

I think he did not go to regular school like all of us. I think he used his brain by himself. Otherwise he would have been like all of us..Having no idea of what has been learned, even after graduating, and then go on to teach next generation..!!! Schools have become the graveyards of creativity and thinking...Sorry to say that..and I like his idea of learning for the sake of knowledge and then share it with the rest of the world. Instead of assuming some titles and get locked up in offices..

[@yohaijohn]

is it correct to say that in an isothermic process the system is in energetyc equilbriom with the enviornment?

[@MrAlb0t]

@KingJulien234 please ignore what i just wrote ya xD clearly i'm not that good at termodynamics ^^ but you should really se the carnot engine movie from khanacedemy.

[@HotPepperLala]

Did god send you down on Earth? Because you are an angel...

[@Claerdelune]

could someone explain to me the difference between adiabatic and ''no change in temperature''? I thought they were synonyms...

[@SinDaCode]

An adiabatic process is where there is no transfer of heat in the system. However, this does not necessarily imply that there is not a change in temperature due to a process.

[@jane4149]

thanks alot

[@carlitok3567]

Nice😮

[@everydayISLAM]

i wanted to ask that if it is an adiabatic processes how is kE transferred out of the system and does not removing pebbles mean u are lowering the ammount of pe of the pebbles confusing plz answwer this is confusing

[@HolyCrapyJack]

Hi, my teachers use the convention of W beeing negative as it is the work done to the system and U beeing DeltaU=Q+W does thoses conventions change depending on state/country?

[@9h0t0n]

😂😂

[@s0m0c]

Gracias.

[@jackiechiu20]

what I understand kelvin planct statement means no heat can transfer to workdone 100%. then why isothermal process can be

[@anubhavagrawal3963]

That's related to efficiency and non-ideality of real-world things, I guess.

[@MsRashi21]

excellent

[@eliaswehbe8592]

if I have a system with more than one particle, is the internal energy equal to the kinetic energy in the system?

[@Bruno-mi2rd]

I'm inclined to say no

[@kristin800]

but he said -w work because it was done by the system but work is negative only when work is done on the system

[@josephevans1490]

Well the sign of work depends on what you define as the system. He defined the particles under the piston as the system. Therefore, when he lifted a rock from the piston, the weight pushing down on the particles lessened. And the piston-particle system became out of equilibrium in terms of energy. In order to re attain equilibrium, the particles had to collide with the piston, this time moving it until they were once more in equilibrium. When the piston was moved upwards by the particles, work was done by the particles in order to displace the metal, and therefore, work was done by the system; which was defined as the particles under the piston. The reason equilibrium was able to be re attained, is because when the volume increases, the number of contacts per second decreases, and therefore, the average force due to particle collisions decreases. This average force decreases until the pressure under the piston( established as a result of the particles) is equal to the downwards pressure established by the pistons weight and the standard outside air pressure for the given conditions.

[@tilakmadichettitheappdeveloper]

in physics it's opposite

[@amodinisingh4742]

no actually the work is negative when it is done by the system on the surrounding and positive when work is done on the system. The work is negative when done by the system because loss of energy takes place.

[@rawsp33d3]

You keep saying you're trying to stay away from being mathy, but some of us are physicists and like as much math involved as possible :( Hahaha

[@everydayISLAM]

at 6:58 you say that they average out to A+b/2 can u explain How

[@Raindeux]

To get an average, you sum all the components together then divide that value by the number of components. Add A and B, then divide by 2 since there's 2 components, A and B.

[@atharvabaste4455]

How did the avg K.E. go down? at 4:33

[@josephevans1490]

The average kinetic energy within the space under the piston decreased because the volume under the piston increased when the rock was lifted off of the piston. Therefore, there is less likely to be an energetic particle at a specific place in time.

[@dannyboy163]

I love you.

[@crgreenphil]

who are you teaching this to? i don't think it is to regular high school students.

[@Mohg_Lord]

the teach us this in school and we don't yet have the math skills for it , we are losers

[@dancedance182]

MIT. go to his website from his youtube page for more info

[@Haku1234567890]

Rezerwoaar :3

[@dancedance182]

No. he went to MIT and Harvard.

[@MutantNinjaFly]

This subject material is hell on earth. It involves a lot of math. I detest math.

[@AymanRSaleh]

I don't think he majored in MIT... reread my post.

[@KingRobbStark]

First