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JEE Main 2021 (18 Mar, Shift 1) · P-V Diagrams & Cyclic Processes

P-V Diagrams & Cyclic Processes question from JEE Main 2021 (18 Mar, Shift 1)

Q53JEE Main 2021 · 18 MAR · SHIFT 1Medium

P-V Diagrams & Cyclic Processes

The P-V diagram of a diatomic ideal gas system going under cyclic process as shown in figure. The work done during an adiabatic process CD is (use $\gamma$ = 1.4):

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Answer: (a)

Adiabatic work: $W = \frac{P_CV_C - P_DV_D}{\gamma - 1}$ .
C: $100 \times 4 = 400$ J; D: $200 \times 3 = 600$ J.
$W_{CD} = \frac{400 - 600}{0.4} = -500$ J
So the answer is (a) $-500$ J.

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