Question

Helium atoms is two times heavier than a hydrogen molecule At $298K$, the average kinetic energy of a helium atom is:

• A. Two times that of a hydrogen molecules
• B. Same as that of a hydrogen molecules
• C. Four times that of a hydrogen molecules
• D. Half that of a hydrogen molecules

Answer 1

The correct option is B Same as that of a hydrogen molecules

Average kinetic energy does not depends upon the number of atoms.

Average kinetic energy depends on the only temperature.

So, same Kinetic energy at the same temperature.