Answer to Question #141380 in General Chemistry for Mark

Question

A system of Argon gas has an average kinetic energy of 3818 J. What is the average kinetic energy of a system of Helium at the same temperature?

Answer 1

According to kinetic theory, average kinetic theory $K.E=\frac{3}{2}kT$ , where k is the Boltzmann constant. Since, kinetic energy is independent of molar mass, their energies will be same for hydrogen and helium at the same temperature.

$\therefore$ The average kinetic energy of the system of Helium is 3818J also