First law of thermodynamics | Chemical Processes | MCAT | Khan Academy

[@khhtutor]

As a high school teacher in Taiwan, I give big applause to the brilliant way of ur presenting the first law of thermodynamics.
The animation just catches me.

[@bilalzafar2871]

Sir r u from Taiwan omg

[@loftkey]

Thankyou!!! Solid explanation if only my physics teacher could teach like this!

[@GiorgioCamozzi]

+Lumid I I feel you my friend!

[@jlancepolk]

This dude is my favorite KA teacher, hands down!

[@alexdavies7447]

Very well explained. thank you

[@yourfuturedocburenbeiya]

Thank you so much for your videos like this one! I understand it so much more

[@pureawesomeness2382]

Everything about this video is beyond perfect! thanks for sharing :) Kudos!

[@1Shoda]

Please keep making more videos, this video was awesome

[@stephenonyango6091]

thank you

[@hamzaarain7894]

this video gives me a lot of knowledge

[@talhawaheed438]

That is some wow teaching....😮

[@crazzydaissy7915]

ur videos always amazes me ....thanks alooooootttt for the efforts

[@mehrinfirdousi3834]

thank you so much this helped a ton :)

[@BM-jz4gq]

Didn't know Owen Wilson is a chemist?

[@mdubaidurrahman]

It's just an awesome explanation.

[@hippos90]

Thank u for a good explenation! (What program r u using??)
/Hippo

[@salman5628]

thanks for this and keep posting

[@vortyx090]

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

[@beulahnarendrapurapu2029]

You missed the potential energy contribution to internal energy. A great presentation though!

[@sarah2184]

Thanks i actually understood everything that i couldn't understand in two years 😭

[@EngAziz]

Thanks a lot

[@TheSujitKDas]

Brilliant.

[@Godxgaming9]

good explanation

[@abdulwasayejaz7107]

Brilliant!!!!!

[@SarahMohammedAli7]

thanks

[@rashedulhasan8336]

Osadharon :D

[@jordankhadafi6416]

you are genius

[@sheikayaz189]

awesome

[@bilalzafar2871]

Sir plz make video on Mdcat mcqs. Chemistry ,physics and biology with explanation

[@ecea002kamakhyaaareyodeori6]

:) Thank You

[@rassimsimou1594]

Good

[@beautyofnature6609]

Is it possible that piston moving down alongwith supply of the heat...simultaneously .....

[@oualidbachkad8626]

what if the piston goes up and down how do we calculate the work (great video btw)

[@thesophisticatedtarzan1797]

Well I'm just a undergrad student, and your question lacked information regarding the system i.e whether the system was supplied with heat and then you start moving the piston, or are you just moving the piston.
But here's how I believe it breaks down.( Considering the 2nd case) If in the system the piston just periodically moves up and down then there are two possibilities.
1: the piston oscillates even no of times and ends up where it started, then the work done should be zero because Wd=Fd(Cos©) hence when the piston is going down we have work=Fd (Cos0=1)
and coming up work= -Fd (Cos180 = -1)
So they cancel out.
2: the piston doesn't end up where it started then all the precious oscillations will be meaningless and only the last oscillation will matter and work= Fd

[@mohamedn447]

brilliant

[@ppl4892]

Hey I think there's a mistake in this video because I looked things up and when work is done ON the gas, the value is negative and vice versa. Thank you.

[@santhoshkumar-iv4cr]

Work done on the system is positive

[@Brian-xg1ux]

I like your calculus

[@SoumilSahu]

he didn't use any...

[@seandever]

Better than Khan

[@queseraseraballdance]

5:22

[@tejaspatel7390]

but not bad!!!!

[@NavajoLion]

hahahha! They are a bunch of dopes! Just like me

[@kanishk9490]

i felt that too

[@dilanaslan2699]

He says "thermodynamics" like a Russian

[@tejaspatel7390]

boring

[@giuseppevianello9288]

Very well explained.

[@aena_]

Thanks