Question

give two evidence with explanation for Molecular motion of gases

Answer 1

Gases were among the first substances studied using the modern scientific method, which was developed in the 1600s. It did not take long to recognize that gases all shared certain physical behaviours, suggesting that gases could be described by one all-encompassing theory. The kinetic molecular theory of gases is a model that helps us understand the physical properties of gases at the molecular level. It is based on the following concepts:

Gases consist of particles (molecules or atoms) that are in constant random motion.

Gas particles are constantly colliding with each other and the walls of their container. These collisions are elastic; that is, there is no net loss of energy from the collisions.

Gas particles are small and the total volume occupied by gas molecules is negligible relative to the total volume of their container.

There are no interactive forces (i.e., attraction or repulsion) between the particles of a gas.

The average kinetic energy of gas particles is proportional to the absolute temperature of the gas, and all gases at the same temperature have the same average kinetic energy.

Answer 2

The gaseous molecules are not strongly bonded with each other that's why the gaseous molecules are always in a motion.

Evidence of the gas molecule's motion:

1)The phenomenons like osmosis and diffusion occur due to the free motion of gaseous molecules.

2) Due to the free motion of gaseous molecules,we can easily compress or decompress any type of gas.