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Equipartition Theorem

The value of ...

Question

The value of rotational K.E. at temperature T of one gram molecules of a diatomic gas will be-

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Solution

According to law of equipartition of energy, a molecule can have $\frac{1}{2} K T$ energy per degree of freedom.

A diatomic molecule has two rotational degrees of freedom. Hence the total rotational kinetic energy is $K T$ .

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