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

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

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Chemical Engineering Thermodynamics
Which one is true for a throttling process?

A gas may have more than one inversion temperatures
The inversion temperature is different for different gases
The inversion temperature is same for all gases
The inversion temperature is the temperature at which Joule-Thomson co-efficient is infinity

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