Question

Oxygen and hydrogen gases are at the same temperature. The ratio of the average kinetic energy of an oxygen molecule and that of a hydrogen molecule is

• A. $4$
• B. $16$
• C. $\frac{1}{4}$
• D. $1$

Answer 1

The correct option is D $1$

We know that:
$KE=\frac{5}{2}kT$

Given: same temperature

Kinetic energy for diatomic gas is given by
$KE=\frac{3}{2}kT$

$\frac{(KE{)}_{O_2}}{(KE{)}_{H_2}}=\frac{\frac{5}{2}kT}{\frac{5}{2}kT}=1$

FINAL ANSWER: (c)