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The average energy per molecule of a tri...

The average energy per molecule of a triatomic gas at room temperature T is

A

3kT

B

`1/2kT`

C

`3/2kT`

D

`5/2kT`

Text Solution

Verified by Experts

The correct Answer is:
A
A triatomic (non-linear) gas molecule has 6 degrees of freedom (3 translational, 3 rotational and no vibrational) at room temperature.
According to the law of equipartition of energy, the average energy per molecule of a triatomic gas at room temperature T is
`overset(-)E=1/2fkT=1/21/26kT=3kT`
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