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Question: A vessel contains a mixture of one mole of oxygen and two moles of nitrogen at 300 K. The ratio of t...

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

A

1 : 1

B

1 : 2

C

2 : 1

D

Depends on the moment of inertia of the two molecules

Answer

1 : 1

Explanation

Solution

Use law of equipartition of energy

U = 12\frac{1}{2}kT(per degree of freedom for one molecule)