Question

Which of the following ideal gases has higher value of average kinetic energy per mole at given temperature $-N_2,C{O}_2,O_2$?

• A. $N_2$
• B. $C{O}_2$
• C. $O_2$
• D. All have equal value of KE

Answer 1

The correct option is D All have equal value of KE

All of the ideal gases ($-N_2,C{O}_2,O_2$) have equal value of average kinetic energy per mole at given temperature.
For any gas, average kinetic energy per mole at given temperature is $\frac{3}{2}RT$. It is constant at given temperature and is independent of the identity or molecular weight of ideal gas.
Note:
The average kinetic energy per molecule at given temperature is $\frac{3}{2}kT$.