Question

At the same temperature and pressure which of the following gas will have highest $KE$ per mole:

• A. Hydrogen
• B. Oxygen
• C. Methane
• D. All of the above

Answer 1

The correct option is D All of the above

The average kinetic energy per mole of a gas is equal to $\frac{3}{2}RT$ where $T$ is the absolute temperature.
When the temperature is same, the average kinetic energy per mole will be same for hydrogen, oxygen and methane as the average kinetic energy per mole is independent of its molar mass.