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When an ideas gas (γ = 7/3) is heated under constant pressure, then what percentage of given heat energy will be utilised is doing external work

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a
43 %
b
57 %
c
29 %
d
40 %

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detailed solution

Correct option is B

ΔQ=ΔU+ΔW   ⇒  ΔWΔQ=1−ΔUΔQ   ⇒  ΔWΔQ=1−nCVΔTnCPΔT=1−37  = 47  ≈  0.57

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