Kinetic Molecular Theory of Matter

Kinetic Molecular Theory of Matter

According to kinetic molecular theory, matter is composed of molecules. These molecules are always in could be vibration, rotational, translatory, or all of them hence the molecule could have all kind of KE. Hence a molecule possesses kinetic energy due to vibration, translation or rotation. They are called vibrational, translational or rotational kinetic energies. The molecules of a substance attract each other with a force which depends on the distance between them. It decreases rapidly with the increase of distance between them. The velocity of molecules depends on the temperature of the substance. The higher the temperature, the greater will be the velocity of molecules and lower the temperature, smaller would be the velocity of the molecules. Thus the kinetic energy of a molecule increases with the increase of temperature and decreases with the decrease of temperature of the substance.