High pressure steam is expanded adiabatically and reversibly through a well insulated turbine, which produces some shaft work. If the enthalpy change and entropy change across the turbine are represented by ΔH and ΔS respectively for this process ?

Question

Accepted Answer

Δ H = 0 and ΔS = 0. Adiabatic means no heat transfer (Q=0). Reversible and adiabatic implies isentropic, so ΔS=0. Work done means energy changes, so ΔH≠0.