Question

Explain the following :

(1) Gases exert pressure

(2) Evaporation causes cooling

(3) Solids can be converted to liquids

(4) Gases diffuse rapidly​

Answer 1

Gases exerts pressure

The molecules are continually colliding with each other and with the walls of the container when a molecule collides with the wall ,they exert small force on the wall the pressure exerted by the gas is due to the sum of all these collision forces. The more particles that hit the walls, the higher the pressure.