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Diffusion is the movement and spreading of substance throughout its location. For example if you spray perfume on one side of the room the scent will spread throughout the entire room.

Mass transfer is similar because its the movement of particles from areas of high concentration to areas of lower concentration. Going back to our perfume example, there was a high concentration of perfume particles where you sprayed the perfume and a low concentration on the other side of the room, the molecules moved from the area with a high concentration to the area with a lower concentration.

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15y ago

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