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Questions  

A diatomic ideal gas is used in a carnot engine as the working substance. If during the adiabatic expansion part of the cycle the volume of the gas increases from V to 32V, the efficiency of the engine is : 

a
0.25
b
0.5
c
0.75
d
0.99

detailed solution

Correct option is C

T1V1γ-1=T2V2γ-1⇒T2T1=14 So,                  η=1-T2T1=0.75

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