Question

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 that per N₂ molecule is –

• A. 1 : 1
• B. 1 : 2
• C. 2 : 1
• D. Depends on the moments of inertia of the two molecules

Answer 1

Answer: (A)

1 : 1

Answer 2

f₁ = f₂ = 2 ; $\frac{E_{1}}{E_{2}} = \frac{f_{1}}{f_{2}} \times \frac{N_{1}}{N_{2}} \times \frac{T_{1}}{T_{2}}$ = 1 : 1