chemistry

KINETIC THEORY OF GASES

1                    Kinetic molecular theory of gases was proposed by Maxwell, Boltzmen, Calssius.

2                    Kinetic molecular theory is applicable only to ideal gases.

  Every gas contains a large number of tiny particles called molecules.

  The actual volume of the molecules is negligible when compared with the volume occupied gas.

 There are no intermolecular attractions or repulsion between the gas molecules. So ideal gases cannot be liquefied.

 The molecules move randomly and straight in all directions with different velocities.

The molecules collide among themselves and also with the walls of the container.

 The molecular collisions are perfectly elastic.

 Molecular collisions are unaffected by gravity .

 The pressure exerted by the gas is due to the collisions of molecules on the walls of the container. There is no loss of energy in these collisions, ∴ collisions are said to be elastic.

 The average kinetic energy of the gas molecules is proportional to the absolute temperature of the gas.