First slide

Law of equipartition of energy

Question

A vessel contains a mixture of 1 mole of oxygen and two moles of nitrogen at 300 K. The ratio of the rotational kinetic energy per O₂ molecule to that per N₂ molecule is

Moderate

A

1 :1
B

1 : 2
C

2 : 1
D

depends on the moment of inertia of the two molecules.

Solution

T = 300 K, Both O₂ and N₂ are diatomic molecules.
$E_{r} = k_{B} T E_{r} \propto T$

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