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Diffusion (Examples of Diffusion (Stirring some sugar into tea will help…
Diffusion
Examples of Diffusion
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When cooking pasta, the water diffuses into the noodles, making them bigger and moister.
Diffusion in gases
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At first, the gas is concentrated in one area. After diffution, they are no longer concentrated in one area and are mixed in with other gas particles in a more random way.
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Particles - definitions
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Mixture
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Air is a mixture that contains the elements nitrogen, oxygen and argon, and also the compound carbon dioxide.
Diffusion in liquids
Diffusion in liquids is slower than diffusion in gases because the particles in a liquid move more slowly.
For example if you drop a little bit of paint into a jar of water the colour will spread slowly through the water. This is by diffusion.
Diffusion can also happen in liquids. This is because the particles in liquids can move around each other, which means that eventually they are evenly mixed.
Solids
Diffusion does not happen at all in solids because the particles in a solid can only vibrate on the spot, rather than being able to move from place to place.
When chemicals, like the smell of perfume or burning toast, are let loose in a room, the particles mix with the air particles. The particles of smelly gas are free to move quickly in all directions. They eventually spread throughout the whole room. This is called diffusion.