Question:medium

A Carnot engine uses diatomic gas as a working substance. During the adiabatic expansion part of the cycle, if the volume of the gas becomes 32 times its initial volume, then the efficiency of the engine is

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For a Carnot cycle, the efficiency is determined solely by the reservoir temperatures. The adiabatic processes link the temperature ratio to the volume ratio ($T_L/T_H = (V_i/V_f)^{\gamma-1}$) or the pressure ratio ($T_L/T_H = (P_L/P_H)^{(\gamma-1)/\gamma}$). Remember the value of $\gamma$ for different gases (monatomic: 5/3, diatomic: 7/5).

Updated On: Mar 30, 2026

100%
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25%

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The Correct Option is B

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