what does diffusion mean?

Question

many thanks.

NirvanaGal

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Answer 1

Diffusion is the movement of particles of a substance from an area of high concentration to an area of low concentration, resulting in the uniform distribution of the substance. For example, diffusion of particles causes a net movement of particles from areas of higher concentration to areas of lower concentration until equilibrium is reached. This is simply the statistical outcome of random motion: diffusion is a spontaneous process (more familiarly known as a "passive" form of transport, rather than "active"). Diffusion can affect a variety of different quantities. Examples include diffusion of concentration, heat, or momentum. Diffusion increases entropy, decreasing Gibbs free energy, and therefore is thermodynamically favorable. Diffusion operates within the boundaries of the Second Law of Thermodynamics because it demonstrates nature's tendency to wind down, as evidenced by increasing entropy

Answer 2

Diffusion is when a fluid [liquid or gas] passes from a place of high concentration to a low concentration. Example, say someone farts in one part of a room, the people next to the farter can smell it right away very strongly. Over time, the smell will spread out so that people further away can smell it - but less strongly. Eventually, the smell will have spread out so much, no one can smell it as the concentration is too low. This is diffusion.

Answer 3

The spreading out of particles of a substance mixing with another.
It can also be the separation of particles by using a diffusion material like a special membrane that allows smaller particles to pass through while blocking larger ones. (Like a filter).
(In gaseous form, under high vacuum, a compound of Uranium is separated into U 235 and U 238 by diffusion processes using special membranes, in conjunction with centrifuges).

Answer 4

It is the net movement of particles from a region of higher concentration to a region of lower concetration.

Like you add some salt into your soup and dun stir it but after a few hours, the whole bowl of soup will taste salty. This is because diffusion has occurred.

Answer 5

yeah what ^^^^ said, its like a light has a cover on it, its called a diffuser, this is to take away the initial intensity as well as spread the light so that it is softer and more even in the desired area, take away the diffuser and you get a more intense light with less coverage.

Al....

Answer 6

Try going to your favorite search engine, and type in "diffusion". Follow the links that you find interesting. Do not quote Wikipedia. Go to a reference that is more direct.

Answer 7

It means the movement of particles through a permeable membrane from an area where there is a high concentration, to an area where there is a lower concentration. This then equals out the concentration so that is equal on both sides of the membrane.

Answer 8

Diffusion is taking a mass and spreading it out so its less concentrated like light or water going thru a filter or lens. light going thru a prism breaks it down into light spectrum.

Answer 9

Diffusion is the movement of particals from the region of high concetration to the region with low concetration through semi-permiable membrene

Answer 10

It's when particles of a substance move from an area of high concentration to an area of low concentration