Question

What is Graham's law of diffusion?

Answer 1

Graham's law of diffusion:

1. It was formulated by Scottish physical chemist Thomas Graham in 1848.
2. Graham found experimentally that the rate of diffusion of a gas is inversely proportional to the square root of the mass of its molecular mass.

$\raisebox{1ex}{$Rate1$}\!\left/ \!\raisebox{-1ex}{$$}\right.Rate2=\raisebox{1ex}{$\sqrt{M}$}\!\left/ \!\raisebox{-1ex}{$\sqrt{m}$}\right.$

1. Here, Rate 1 is the rate of diffusion of the first gas (volume or number of moles per unit time).
2. Rate 2 is the rate of diffusion of the second gas.
3. M is the molar mass of gas 1.
4. m is the molar mass of gas 2.