One mole of an ideal rigid diatomic gas is initially in a st

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One mole of an ideal rigid diatomic gas is initially in a state A at atmospheric pressure and temperature TA = 27 ºC.It is first heated isochorically to a state B where the pressure is twice that in state A.The gas then undergoes an isothermal expansion to a state C,where the pressure is again atmospheric.Next the gas is cooled isobarically to state A.(a) Carefully sketch a P-V diagram for the cycle.(b) Calculate the change in internal energy of the gas,the heat flow into the gas and the work done by the gas in each of the three processes A → B,B → C and C → A.(c) What is the thermal efficiency of the cycle?

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