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

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

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Chemical Engineering Thermodynamics
A large iceberg melts at the base, but not at the top, because of the reason that

All of these
The iceberg remains in a warmer condition at the base
Due to the high pressure at the base, its melting point reduces
Ice at the base contains impurities which lowers its melting point

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