What is the relationship between molecular weight and rate of diffusion?

Dec 5, 2015

${U}_{r m s} = \sqrt{\frac{3 R T}{M M}}$

Explanation:

The rate of diffusion (${U}_{r m s}$) is given by:

${U}_{r m s} = \sqrt{\frac{3 R T}{M M}}$

Where MM is the molar mass of the gas.

Thus, when $M M$ increases, the diffusion rate will decrease.