1.

High pressure steam is expanded adiabati-cally 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:$

A. Δ H = 0 and ΔS = 0.
B. Δ H ≠ 0 and ΔS = 0.
C. Δ H ≠ 0 and ΔS ≠ 0.
D. Δ H = 0 and ΔS ≠ 0.
Answer» C. Œî H ‚↠0 and ŒîS ‚↠0.


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