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If γ=CPCV,CP being the molar specific heat of a gas at  constant pressure and CV its molar specific heat at constant volume, number of degrees of freedom of a molecule of gas can be expressed as:

a
52(γ-1)
b
7γ-13γ-1
c
32γ-1
d
2γ-1

detailed solution

Correct option is D

γ=1+2f⇒f=2γ-1

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