+1 862 207 3288 A gas consists of a very large number of molecule which are the perfect elastic spheres and are identical in all respects for a given gas and are different for different gases.
(ii) The molecules of a gas are in a state of continuous, rapid and random motion. They move in all directions with different speeds, ranging from zero to infinity and obey Newton’s laws of motion.
(iii) The size of gas molecule is very small as compared to the distance between them. Hence volume occupied by the molecule is negligible in comparison to the volume of the gas
(iv) The molecule do not exert any force of attraction or repulsion on each other, except during collision.
(v) The collisions of the molecular with themselves and with the walls of the vessel are perfectly elastic. As such the momentum and kinetic energy of the molecules are conserved during collisions.
(vi) There is no concentration of the molecules at any point inside the container i.e molecular density is uniform throughout the gas.
(vii) A molecule moves along a straight line between two successive collisions and the average straight distance covered between two successive collisions is called the mean free path of the molecules.
(viii) The collisions are almost instantaneous i.e the time of collision of two molecule is negligible as compared to time interval between two successive collision.
