Diffusion - movement as illustrated by the applet below...

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Diffusion Diffusion is the movement of particles from an area of higher concentration to an area of lower concentration. The movement is due to collisions, which occur more frequently in areas of higher concentration. The dots on the diagram above represent molecules or ions. After a period of time, the particles becoming dispersed (below). Overall, the movement is from the area of initial high concentration to areas that have a lower concentration. Temperature and the Rate of Diffusion Molecules, atoms, and ions normally move about in an irregular fashion called Brownian motion. As the particles move about, they collide with one another producing a random zig-zag
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Unformatted text preview: movement as illustrated by the applet below. Larger particles move slower, due to their larger mass and may be influenced by numerous collisions with many nearby smaller particles. Smaller particles move faster. The overall energy of movement is proportional to the square root of the temperature. Hotter particles move faster because they have more energy. The rate of diffusion increases as temperature increases because the particles move faster. As temperature increases, the collisions among particles become more energetic, causing particles to move from areas of higher concentration to lower concentration at a faster rate....
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This note was uploaded on 11/10/2011 for the course BIOLOGY bi 101 taught by Professor - during the Fall '10 term at Montgomery.

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Diffusion - movement as illustrated by the applet below...

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