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Q.

A diatomic gas is used in carnot heat engine having efficiency 80%. Find the ratio of volumes of gas during adiabatic expansion.

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a

(15)52

b

(13)52

c

(15)3/2

d

(15)25

answer is C.

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Detailed Solution

η=1−T2T1

0.8=1−T2T1

T2T1=0.2

(V2V1)γ−1=T1T2=5

V1V2=1552

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