Question

Helium atom is 2 times heavier than hydrogen molecule. At ${15}^{0}C$the average kinetic energy of helium atom is:

• A. 2 times that of $H_2$
• B. same as that of $H_2$
• C. 4 times that of $H_2$
• D. 1/2 times that of $H_2$

Answer 1

The correct option is B same as that of $H_2$

"At constant temperature, average kinetic energy is constant"