Question

Among gas and liquid which diffusion is fast ? Why ?

Answer 1

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.

Answer 2

Diffusion depends on the kinetic energy of a particle.
If kinetic energy is more then diffusion is faster.

In case of liquid and gas, gas particles have more kinetic energy than liquid particles so the gas particles diffuse faster than the liquid particles.

Hope it helps.... :-)