Recent content by kal00

Something in my head clicked and I'm guessing the Q - W = dU is only for closed systems?

So I'm just a little confused with turbine work. Generally I've been solving it with first law -W = H2 - H1, so W = H1 - H2 = Cp(T1 - T2) But what about Q - W = U2 - U1? Can't that make it W = U1 - U2 = Cv(T1 - T2) giving a different answer. I have a feeling my understanding of...