Chemical Engineering Thermodynamics
Compressibility factor (i.e., the ratio of actual volume of gas to the volume predicted by ideal gas law) for all gases are

Always greater than one
Same at the same reduced temperature
Same at the same reduced pressure
Both B & C

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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 pressure to one fourth at constant temperature
Reducing temperature to one fourth at constant pressure

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