Engineering Thermodynamics
According to Gay Lussac’s law for a perfect gas, the absolute pressure of given mass varies directly as

Absolute temperature, if volume is kept constant
Temperature
Volume, if temperature is kept constant
None of these

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Engineering Thermodynamics
According to Clausius statement of second law of thermodynamics

Heat can be transferred from low temperature to high temperature source if COP of process is more than unity
Heat can
Heat can be transferred for low temperature to high temperature source by using refrigeration cycle
Heat can

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