Question

State any four assumptions of kinetic theory of gas.

Answer 1

Hint: The kinetic theory of matter rests upon two fundamental hypothesis:
The molecular constitution of matter, and
The identification of heat with the motion of molecules.

Complete step by step answer:
In developing the kinetic theory of gases, the following assumptions are made about the behavior of the ideal gas:
A small sample of gas consists of a large number of molecules that are identical for a given chemical species and are like minute hard elastic spheres, which are in perpetual random motion.
During the motion, the molecules collide with one another and also with the walls of the container, the collisions being perfectly elastic; in other words, there is no loss of kinetic energy when the collisions occur. As the chance of collision in all directions is the same, the collisions do not affect the molecular density.
Since the molecules are like geometrical mass-points, the actual volume occupied by them is negligible, compared to the total volume of the gas, that is, the volume of the container.
The molecules are inert and exert no forces (attraction or repulsion) on one another except when they actually collide with each other and with a wall; between two successive collisions they move in straight lines with uniform speed.

Note:
The kinetic theory of gases is mostly limited to monoatomic gases, assuming the gas is an ideal gas. The kinetic theory is based on the evidence of molecular motion, such as diffusion, expansion of gas, and the Brownian movement.