Kinetic Theory. Microscopic Analysis. The behavior of a gas should be described by the molecules. The gas consists of a large number of identical particles of mass m . The particles have negligible size and no internal structure.
What is the average energy of an air molecule at room temperature (293 K)?
What is average speed for a nitrogen molecule (28 g/mol)?
Energy directly relates to temperature.
(3/2)kT = 6.07 x 10-21 J.
To get the speed requires the mass.
m = (0.028 kg/mol) / (6.022 x 1023 /mol) = 4.65x10-26 kg