KINETIC MOLECULAR THEORY
The theory explains gas behaviours based on the following assumptions;
A gas is composed of a very large number of extremely small particlesin constant, random, straight-line motion.
Molecules of a gas are separated by great distances.
Molecules collide with one another and with the walls of their container. When molecules collide with one another, the collisions are elastic. This means that the total kinetic energy remains constant; no kinetic energy is lost.
There are assumed to be no forces between molecules.
The average kinetic energy of a molecule is proportional to the absolute temperature.The higher the temperature, the greater the molecular kinetic energy. 33