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Question

Each molecule of gas has f degrees of freedom.The ratio (Cp/Cv)=γ for the gas is

A
1+(f/2)
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B
1+(1/f)
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C
1+(2/f)
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D
1+(f-1/3)
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Solution

The correct option is C 1+(2/f)
Given :Each molecule of gas has f degrees of freedom.The ratio (Cp/Cv)=γ(Cp/Cv)=γ for the gas is

Solution :
We know that Cv=fR2
and Cp=Cv+R fR2+R Cp=(f+2)2R

γ=CpCv = 1+2f
The Correct Opt= C

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