Two gases-argon (atomic radius 0.07 nm, atomic weight 40) and xenon ( atomic radius 0.1 nm, atomic weight 140) have the same number density and are at the same temperature. The ratio of their respective mean free times is closest to :
Consider two ideal diatomic gases A and B at same temperature T. Molecules of the gas A are rigid and have a mass m. Molecules of the gas B have an additional vibrational mode and have a mass . The ratio of the specific heats of gas A and B respectively is:
Molecules of an ideal gas are known to have 3 translatinal D.O.F and two rotational D.O.F. The gas is maintained at temperature T. The total internal energy, U of a mole of this gas and the value of are given respectively, by: