Question

Which of the following expressions correctly represents the relationship between the average molar kinetic energy, $\overline{KE}$ of $CO$ and $N_2$ molecules at the same temperature?

• A. ${\overline{KE}}_{CO}={\overline{KE}}_{N_2}$
• B. ${\overline{KE}}_{CO}>{\overline{KE}}_{N_2}$
• C. ${\overline{KE}}_{CO}<{\overline{KE}}_{N_2}$
• D. Cannot be predicted unless the volumes of the gases are given

Answer 1

The correct option is A ${\overline{KE}}_{CO}={\overline{KE}}_{N_2}$

The expression ${\overline{KE}}_{CO}={\overline{KE}}_{N_2}$ correctly represents the relationship between the average molar kinetic energy, of $CO$ and $N_2$ molecules at the same temperature.
Note:
The average molar kinetic energy $=\frac{3}{2}RT$.
The average molar kinetic energy is independent of the nature of the gas. It depends only on temperature.