[MrTeo]

Here's the question: we've got a Cu/Zn cell ([Zn²⁺]=1 M, [Cu²⁺]=1 M, T=289 K, p=1 atm). Find:

a) f.e.m. (done)
b) maximum amount of work produced (done)
[...]
d) the entropy change of the universe caused by the battery's discharge (constant T and p)
e) does something change if V and T are constant, instead?

Up to now, except for some quite trivial ideas such as ∆S=0 if the discharge happens reversibly or ∆S>0 otherwise, I have no clue. I also thought about using the change in vapor pressure of the different components of the mixture due to the discharge but I find it a little too messy, there should be an easier way.

Any contribution will be greatly appreciated!