Chemical Engineering Thermodynamics
When liquid and vapour phases of one component system are in equilibrium (at a given temperature and pressure), the molar free energy is

Same in both the phases
More in vapour phase
More in liquid phase
Replaced by chemical potential which is more in vapour phase

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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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