Kinetic energy of random motion

Molecules are always in random motion. The average kinetic energy of random motion is proportional to the absolute temperature, or temperature in kelvins. Heat increases the energy of random motion of a gas. 

For these latter conditions the mean kinetic energy of random motion is about 0.042 e.v. for Ts = 320° 30°K., and there are extensive data for the rate coefficients of reactions such as ... 

Kinetic Temperature Temperature inferred from the amount and distribution of kinetic energy of random motion of the centers of mass of molecules. 

In the special case of Equation (9.8), the one-dimensional case of Equation (9.3) results. Diffusion may be viewed as a process by which molecules intermingle as a result of their kinetic energy of random motion. 

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