Question

what is diffusion and effusion​

Answer 1

Answer:

Diffusion - Transfer of molecules from higher concentration to lower concentration, for example you can have fragrance of tasty food from your kitchen to your bedroom. This is free inter mingling of the gases when placed in contact with each other.

Effusion - It is the escape of gas from small hole.  as in case of puncture in a rubber tyre.

Answer 2

Answer:

Effusion and Diffusion. Effusion. Effusion is the escape of gas through a small hole into an evacuated container. Because larger molecules are more cumbersome, and more difficult to fit through a small orifice, the rate of effusion is slower for larger molecules.