Diffusion

What is Diffusion? Diffusion is the process in which molecules from a region of higher concentration to one of lower concentration by random molecular motion. The result of diffusion is a gradual mixing of material. In a phase with uniform temperature, absent external net forces acting on the particles, the diffusion process will eventually result in complete mixing or a state of equilibrium. Basically, it is the movement of molecules from an area of high concentration to a lower area. Molecular diffusion is typically described mathematically using Fick's laws. For example a cube of sugar being dropped into a beaker containing water. The sugar molecules, being the region of higher concentration, diffused into the water, being the region of lower concentration. Now the sugar has been dissolved into the water, or as we might say, diffused. If you want to view the video demonstration of diffusion please visit this site: http://http://highered.mcgraw-hill.com/sites/0072495855/student_view0/chapter2/animation__how_diffusion_works.html

References:
http://http://highered.mcgraw-hill.com/sites/0072495855/student_view0/chapter2/animation__how_diffusion_works.html
http://http://en.wikipedia.org/wiki/Molecular_diffusion
Glossary:
Fick's laws of diffusion describe diffusion and can be used to solve for the diffusion coefficient, D. They were derived by Adolf Fick in the year 1855.