Which gas, hydrogen or helium, is moving faster?

Question

A gas jar at room temperature contains a mixture of equal volumes of hydrogen, H2 and Helium, He.
(a)which gas is moving faster?
give a reason for your answer.
(b) If the gas jar is warmed to 50 degrees celsius, state what would happen to the speeds of the gases.

Answer 1

Hydrogen will move faster being lighter. The average kinetic energy of a molecule at a given temperature is same. So, lesser the mass, higher the velocity.

When gas is heated, kinetic energy goes up and thus the velocity of the gas molecules also goes up.

Answer 2

Temperature is a measure of the AVERAGE kinetic energy of the gas molecules present.
If the gases are mixed, and of equal temperature, then all the molecules must be of the same kinetic energy.
Hence, the lighter molecules must be moving faster than the heavier ones in order to make up for the difference in mass.

If the jar is warmed to 50 deg the speeds of the gases increase proportionally.

Answer 3

a) I suspect hydrogen because the molecule is lighter.

b) The gases will move faster (the pressure gets higher)

Answer 4

hydrogen

Answer 5

hYDROGEN 100%