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Question

If a gas has f degree of freedom, the ratio of specific heats of the gas (CPCV) is

A
1+f2
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B
1+f2
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C
1+1f
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D
1+2f
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Solution

The correct option is D 1+2f
Cv=R×f2
CpCv=R
Cp=Cv+R
=R×f2+R
Cp=R(f2+1)

CpCV=R(f2+1)R×f2=1+2f

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