Question

Postulates of kinetic molecular theory of gases in points

Answer 1

1. The molecules in a gas are small and very far apart. Most of the volume which a gas occupies is empty space.

2 Gas molecules are in constant random motion. Just as many molecules are moving in one direction as in any other.

3 Molecules can collide with each other and with the walls of the container. Collisions with the walls account for the pressure of the gas.

4 When collisions occur, the molecules lose no kinetic energy; that is, the collisions are said to be perfectly elastic. The total kinetic energy of all the molecules remains constant unless there is some outside interference with the

5 The molecules exert no attractive or repulsive forces on one another except during the process of collision. Between collisions, they move in straight lines.

Answer 2

The individual molecules that make up the gas take up no volume; they are point-particles. The particles collide with each other and the walls of the container, and all of these collisions are elastic, meaning that no energy is lost as a result.