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U=0

Posted: Fri Mar 15, 2019 10:48 pm
by paytonm1H
is the change in internal energy always equal to zero for isothermal, reversible expansion?

Re: U=0

Posted: Fri Mar 15, 2019 11:24 pm
by skyeblee2F
When dealing with an ideal gas (which we pretty much always are in this class), the ∆U is 0 for every isothermal process. In the case os isothermal reversible expansion, ∆U=q+w=0 so q=-w

Re: U=0

Posted: Sun Mar 17, 2019 5:40 pm
by Roberto Gonzalez 1L
Yes, for ideal gases; reversible expansion the total change in internal energy should be 0 while q and w are the ones that vary depending on the situation.

Re: U=0

Posted: Sun Mar 17, 2019 5:42 pm
by Anita Wong 1H
yes! deltaU= 0 for isothermal reversible expansion

Re: U=0

Posted: Sun Mar 17, 2019 5:58 pm
by harshitasarambale4I
When U=0 is w=-q always true?

Re: U=0

Posted: Sun Mar 17, 2019 7:31 pm
by Anjali 4A
Yes, I think w always =-q

Re: U=0

Posted: Sun Mar 17, 2019 10:14 pm
by Helen Mejia 1I
yes it is equal to zero.