Chemical Engineering Thermodynamics
Claussius-Clayperon equation gives accurate result, when the

Vapour pressure is relatively low and the temperature does not vary over wide limits
All of these
Volume in the liquid state is negligible compared with that in the vapour state
Vapour obeys the ideal gas law and the latent heat of vaporisation is constant

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Chemical Engineering Thermodynamics
Which of the following will increase the volume of a real gas by four times ?

Reducing the temperature to half and doubling the pressure
Doubling the absolute temperature as well as pressure of the gas
Reducing temperature to one fourth at constant pressure
Reducing pressure to one fourth at constant temperature

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