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A thermodynamic system is taken through the cycle ABCD as shown in figure. Heat rejected by the gas during the cyclic process is:

1. 2PV
2. 4PV
3. 1/2 PV
4. PV

Correct answer: PV

Solution

In a cyclic process, the net work done by the system is equal to the net heat exchanged. By analyzing the given cycle, the heat rejected corresponds to the area enclosed by the cycle on the PV diagram, which is PV.

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