[rawratthis]

Hi!

U= q + w
isothermal, U=0 right?
so s q=-w

also main question i have here  is:

W= PdV
when do we use
w=nRln(v2/v1)
w=P(v2-v1)

\im taking physical chemistry for the past two months and I am still getting this confused

[Schrödinger]

W= PdV

Since this is Chemical Forums, I think you should check your sign conventions.