Chemical Engineering Thermodynamics
Claussius-Clayperon equation gives accurate result, when the

Volume in the liquid state is negligible compared with that in the vapour state
All of these
Vapour obeys the ideal gas law and the latent heat of vaporisation is constant
Vapour pressure is relatively low and the temperature does not vary over wide limits

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Chemical Engineering Thermodynamics
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:

Δ H ≠ 0 and ΔS = 0
Δ H = 0 and ΔS = 0
Δ H = 0 and ΔS ≠ 0
Δ H ≠ 0 and ΔS ≠ 0

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