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A diatomic ideal gas is used in a carnot...

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 32 V, the efficiency of the engine is ……………… .

A

0.0025

B

0.005

C

0.0075

D

0.0099

Text Solution

Verified by Experts

The correct Answer is:
C
`T_2/T_1 = (V_1/V_2)^(gamma - 1) = ( 1/32)^(7/5 - 1) rArr therefore T_2/T_1 = 1/4`
Efficiency`eta = 1 - T_2/T_1 = 1 - 1/4 = 0.75 `
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