Molecules have a type of energy called thermal motion (heat). One result of thermal motion is diffusion, the movement of molecules of any substance so that they spread out evenly into the available space. Each molecule moves randomly, yet diffusion of a population of molecules may be directional. To understand this process, let's imagine a synthetic membrance sperating pure water from a solution of a dye in water. Assume that this membrane has microscopic pores and is permeable to the dye molecules. Each dye molecule wanders randomly, but there will be a net movement of the dye molecules across the membrance to the side that began as pure water. The dye molecules will continue to spread across the membrane until both solutions have equal concentrations of the dye. Once that point is reached, there will be a dynamic equilibrium, with as many dye molecules crossing the membrane each second in one direction or the other.

This is not a challenge to find them, I was just typing that out as I read and ended up with 3 typos.

Here's a typo:

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EAT A DICK

This post has been edited by NeoDaReaper on Wed - Oct 14 2009 - 14:11:35

found them

OfC