MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryGaseous stateKinetic theory of gases
Helium atom is two times heavier than a hydrogen molecule .At 298 K, the average kinetic energy of a helium atom is
A.two times that of a hydrogen molecule
B.same as that of a hydrogen molecule✓ Correct
C.four times that of a hydrogen molecule
D.half that of a hydrogen molecule
Explanation
We know that, kinetic energy= 3RT/2 Kinetic energy doesn’t depend upon the mass of gas. Therefore, for both gases it must be similar at same temperatures. Maxwell's distribution of molecular speeds