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CGP EDU Academic Team
Published on: September 12, 2026
P-V diagram of a diatomic gas is a straight line passing through origin. The molar heat capacity of the gas in the process will be
Text Solution
Verified by ExpertsThe correct answer is:
C
P-V diagram of the gas is a straight line passing through origin. Hence $P \propto V$ or $PV^{-1}=$
constant
Molar heat capacity in the process $\mathrm{PV}^x = \text{constant is}$
$C = \frac{R}{\gamma - 1} + \frac{R}{1 - x}; \text{ Here } \gamma = 1.4 \text{ (For diatomic gas)}$ $\Rightarrow C = \frac{R}{1.4 - 1} + \frac{R}{1 + 1} \Rightarrow C = 3R$
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