A diatomic ideal gas is used in a Carnot engine as the working subs...

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A diatomic ideal gas is used in a Carnot engine as the working substance. If during the adiabatic expansion part of
\( \mathrm{P} \) the cycle the volume of the gas increases from \( \mathrm{V} \) to \( 32 \mathrm{~V} \), the efficiency of the engine is
[AIEEE 2010]
W
(a) 0.25
(b) 0.5
(c) 0.75
(d) 0.99
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