KINETIC MOLECULAR THEORY (KMT):
A theory which explains the behaviour of gases on the basis of motion of their molecules is called “KMT” of gases.
All the gases are composed of small indivisible particles called atoms or molecules.
Gaseous molecules are always found in motion, travelling in a straight path but in random directions.
There are large spaces present between molecules of gases as compared to particles of solid and liquid.
There will be no force of attraction or repulsion found between molecules of gases.
The real volume of a gas is negligible as compared to the volume occupied by gas or apparent volume.
The distance between two consecutive collisions of molecules of gases while present in a container is called “FREE PATH”.
MEAN FREE PATH:
The distance travelled by a molecule between two consecutive collisions is called Free Path. The average of all free path of molecules of gases is called “Mean Free Path,”
When molecules of gases collide with each other or with walls of container, these collisions are perfectly elastic.