U=0

[paytonm1H]

is the change in internal energy always equal to zero for isothermal, reversible expansion?

[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

[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.

[Anita Wong 1H]

yes! deltaU= 0 for isothermal reversible expansion

[harshitasarambale4I]

When U=0 is w=-q always true?

[Anjali 4A]

Yes, I think w always =-q

[Helen Mejia 1I]

yes it is equal to zero.