Question

A container contains $O_2$ and $N_2$ in equal molar concentration at same temperature, what is the $CORRECT$ statement about the average molar kinetic energy of the two gasses?

• A. Depends upon volume
• B. $K{E}_{N2}=K{E}_{O2}$
• C. $K{E}_{N2}>K{E}_{O2}$
• D. $K{E}_{N2}<K{E}_{O2}$

Answer 1

The correct option is B $K{E}_{N2}=K{E}_{O2}$

Molar kinetic energy$=KE=\frac{3}{2}RT$

It is dependent on temperature.

Average kinetic is directly proportional to temperature.

Hence average KE is same as temperature is same.

So the correct answer is(B) $K{E}_{N_2}=K{E}_{O_2}$