Chemistry
Graham Law of Diffusion
Compare rates of diffusion of two gases.
r₁ / r₂ = √(M₂ / M₁)
Formula Explanation
Rate of diffusion is inversely proportional to square root of molar mass.
Variables Explained
r = rate of diffusion; M = molar mass.
Solved Example
Compare rates of H₂ (M=2) and O₂ (M=32).
r_H₂ / r_O₂ = √(32/2) = √16 = 4.