Engineering Thermodynamics
The heat supplied to the gas at constant volume is (where m = Mass of gas, cv = Specific heat at constant volume, cp = Specific heat at constant pressure, T2 - T1 = Rise in temperature, and R = Gas constant)

mcp (T2 - T1)
mcv (T2 - T1)
mcp (T2 + T1)
mR (T2 - T1)

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Engineering Thermodynamics
According to Clausius statement of second law of thermodynamics

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

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