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Question

A polyatomic ideal gas has 24 vibrational modes. What is the value of γ?


A

1.03

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B

1.30

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C

10.3

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D

1.37

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Solution

The correct option is A

1.03


Explanation for correct option
Since each vibrational mode has 2 degrees of freedom hence total vibrational degrees of freedom=48

f=3T+3R+24×2V=54γ=1+2ff=numberofdegreesoffreedomduetotranslation,rotation,vibrationγ=1+(2/54)=1+1/27=28/27=1.03

Hence option(A) is correct option.


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