Question

define diffusion. why diffusion is greater in gases and not in solids

Answer 1

heya frnd 

Diffusion is the net movement of molecules or atoms from a region of high concentration to a region of low concentration 

in gases force of attraction between molecules is less than that of solids 

so gas molecules move freely than molecules of solid 

so diffusion in gases is greater than solids 

Answer 2

The movement of particle from higher concentration to lower concentration is called diffusion. diffusion is greater in gases because it's intermolecular space is large compared to solid.
gases have large force of attraction compared to solid.
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