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Question

If a gas has f degrees of freedom, the ratio Cp/Cv of the gas is

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

The correct option is D 1+2f
We know that Cv=no. of degrees of freedom×molar gas constant/2
or Cv=fR/2. Also CPCv=R
Therefore
CpCv=RCv+1=2RfR+1=2f+1
Hence, the correct choice is (d).

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