<p>What is the difference between effusion and diffusion? Can someone explain these two concept to me and provide an example for each? It is confusing.</p>
<p>Diffusion is the spread of molecules, from areas of high density to areas of low density, in like a container or a room, or through a permeable membrane.</p>
<p>Effusion is specifically the rate at which molecules of a certain gas exit a container through a hole.</p>