Now I think I have found it: Clausius inequality
dS ≥ δq reversible/T
I assumed that isoentropic process implied adiabatic irreversible process; however, it means that δq rev≤0
So I have that
ΔS universe = ΔS system − ∫ ( δq rev /T ) > 0
If the process is isoentropic
ΔS universe = − ∫ ( δq rev...
Homework Statement
How to demonstrate that U is minimized at constant V and S, while H at constant P and S?
Homework Equations
ΔS universe = ΔS system + ΔS environment ≥ 0
ΔU system = δq reversible + δw reversible = δq irreversible + δw irreversible
ΔS environment = −∫(δq reversible / T)
dU...