Why is diffusion faster in liquids than in gases?

A key stage 3 revision and recap resource for science, covering the effects on solids, liuids and gases of heating, cooling, pressure and diffusion. ... The particles of smelly gas are free to move quickly in all directions. ... Diffusion in liquids is slower than diffusion in gases because the particles in a liquid move more slowly. read more

Diffusion in gases is much quicker than in liquids. This is simply because the gas particles are about 10x further apart in gases than in liquids at a similar temperature AND they have a much higher average speed. read more

Gas molecules diffuse faster than liquid molecules because they have more kinetic energy and are smaller than liquid molecules. When heat is added to a gas or liquid, the amount of kinetic energy in the molecules increases and speeds up their rate of diffusion. read more