One mole of a diatomic ideal gas undergoes a cyclic process $ABC$ as shown in figure. The process $BC$ is adiabatic. The temperatures at $A, B$ and $C$ are $400$ $K$, $800$ $K$ and $600$ $K$ respectively. Choose the correct statement :

Question

The change in internal energy in whole cyclic process is $250$ $R.$

The change in internal energy in the process $CA$ is $700$ $R$.

The change in internal energy in the process $AB$ is - $350$ $R.$

The change in internal energy in the process $BC$ is - $500$ $R.$

Solution

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