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Q.

In a carnot cycle involving ideal non-linear triatomic gas, if during adiabatic expansion volume increases from 2L to 16L and heat absorbed during isothermal expansion is 8 kcal, then the magnitude of work done by Carnot engine (in kcal) is 

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answer is 4.

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Detailed Solution

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η=|w|8....(1)

η=1−T1T2

T2×2γ−1=T1×16γ−1⇒T1T2=12

|w|8=1−12=12⇒|w|=12×8=4

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