First slide

Law of equipartition of energy

Question

If the molar specific heat of a gas at constant pressure is 7R/2, then the atomicity of gas is

Moderate

A

1
B

2
C

3
D

4

Solution

It is given that $C_{P} = \frac{7}{2} R$ .
The number of degrees of freedom is 7.
Hence, it is a triatomic molecule. That means, its atomicity is 3.

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