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  4. The number of transitional degrees of freedom for a diatomic gas is

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Q. The number of transitional degrees of freedom for a diatomic gas is

AIPMTAIPMT 1993

Solution:

Number of degree of freedom d=3Nāˆ’1
where N is the number of atoms in a molecules
In diatomic molecules, N=2
āŸ¹ d=3(2)āˆ’1=5
Hence diatomic molecule has 5 degrees of freedom (3 translational and 2 rotational).