Explain speed of molecule of gas and average speed `(u_(av))`.

Explanation

Speed of molecules and energy : Molecules are made up of particles of the substance having gaseous state. These particles are for away from each other in a large area. These particles are continuously moving in all direction. The continuous moving particles collide with each other and with the wall of container.
At that time the speed and directions are changed, so that all particles in a container do not have same speed, but have different speeds which are continuously charging. However at one temperature the distribution of speed of molecules is same.
Average molecule speed `(u_(av))` : Suppose, molecules of gas in .n. and its individual speed is `u_(1),u_(2)...u_(n)`.
Average speed is `u_(av)`.
`therefore u_(av)=(u_(1)+u_(2)+.......u_(n))/(n) " "` ....(Eq. -i)