Chemical Engineering Thermodynamics
An ideal liquid refrigerant should

Have low specific heat
Both A and B
Not have unduly high vapour pressure at the condenser temperature
Not have a subatmospheric vapour pressure at the temperature in the refrigerator coils

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Chemical Engineering Thermodynamics
Free energy

Remains unchanged in reversible processes carried at constant temperature and pressure
Decreases in all spontaneous (or irreversible) processes
All of these
Change during a spontaneous process has a negative value

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Chemical Engineering Thermodynamics
An irreversible process

Is an idealised visualisation of behaviour of a system
Yields the maximum amount of work
Is the analog of linear frictionless motion in machines
Yields an amount of work less than that of a reversible process

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