Kinetic-molecular theory of gases, physical theory that explains the behavior of gases by assuming that any gas is composed of a very large number of very tiny particles, called molecules, that are very far apart compared to their sizes. The molecules are assumed to exert no forces on one another, except during rare, perfectly elastic collisions. A gas corresponding to these assumptions is called an ideal gas. The analysis of the behavior of an ideal gas according to the laws of mechanics leads to the Gas Laws. The theory also shows that the absolute Temperature is directly proportional to the average kinetic energy of the molecules. Pressure is seen to be the result of large numbers of collisions between molecules and the walls of the container in which the gas is held. Thermodynamics.

This definition is in context to Explosive. See more contextual defintions for Kinetic-Molecular Theory of Gases.