Question

what is diffusion? know why gases diffuses rapidly

Answer 1

Diffusion is faster at higher temperatures because the gas molecules have greater kinetic energy. Effusion refers to the movement of gas particles through a small hole.

Answer 2

Gases have very low intermolecular forces. As they more volatile their atom are not close enough to get as much as force which liquid have. So gases diffuse faster than liquid and of course solid as well.