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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Chemical Engineering Thermodynamics
In the reaction, H₂ +I₂ ⇋ 2HI, addition of an inert gas will

Increase the partial pressure of H₂
Increase the total pressure and hence shift the equilibrium towards the right
Increase the partial pressure of I₂
Not effect the equilibrium conditions

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Chemical Engineering Thermodynamics
Which of the following is an undesirable characteristics of a refrigerant ?

It should be non-explosive
Its vapor pressure at the condenser temperature should be very high
It should have a sub-atmospheric vapor pressure at the temperature in refrigerator coils
None of these

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