Chemical Engineering Thermodynamics
PVy = constant, holds good for an isentropic process, which is

Isothermal and irreversible
Reversible and adiabatic
Reversible and isothermal
Adiabatic and irreversible

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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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