Effusion & Diffusion - Visual Infographic & Diagrams

Interactive Course Summary

Kinetic Molecular Speeds and Graham's Law — Diffusion models the gradual mixing of gas molecules through continuous particle collisions, while effusion defines the escape of gas through a microscopic pinhole into a vacuum. This module uses Graham's Law to show that the relative rates of effusion and diffusion are inversely proportional to the square root of the gases' molar masses ($\text{Rate} \propto \frac{1}{\sqrt{\mathcal{M}}}$).