Chemical Engineering Thermodynamics
The thermodynamic law, PVy = constant, is not applicable in case of

Ideal compression of air
Adiabatic compression of a perfect gas
Free expansion of an ideal gas
Adiabatic expansion of steam in a turbine

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Chemical Engineering Thermodynamics
If the heat of solution of an ideal gas in a liquid is negative, then its solubility at a given partial pressure varies with the temperature as

Solubility increases as temperature increases
Solubility increases or decreases with temperature depending on the Gibbs free energy change of solution
Solubility is independent of temperature
Solubility increases as temperature decreases

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