Chemical Engineering Thermodynamics
The main feature of Carnot refrigeration cycle is that, it

None of these
Does not need the addition of external work for its functioning
Accomplishes the reverse effect of the heat engine
Transfers heat from high temperature to low temperature

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Chemical Engineering Thermodynamics
The adiabatic throttling process of a perfect gas is one of constant enthalpy

Which is exemplified by a non-steady flow expansion
Which can be performed in a pipe with a constriction
In which there is a temperature drop
In which there is an increase in temperature

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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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