#diffusion #chemistry #stateofmatter

• Diffusion occurs in gases and liquids, due to the random motion of their particles

  • It is where particles move from an area of high concentration to an area of low concentration

  • Eventually the concentration of particles is even as the particles are evenly spread throughout the available space

  • Diffusion happens on its own and no energy input is required

    • Although, it occurs faster at higher temperatures because the particles have more kinetic energy

Diffusion in liquids

• Potassium manganate(VII), KMnO4 , in water is a typical demonstration of diffusion in liquids:

Diffusion in gases

• Diffusion is faster in gases than in liquids

  • This is because gaseous particles have more energy and move quicker than liquid particles

• For example, the diffusion of bromine gas and air

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• At the start, the orange-brown bromine gas is an area of high concentration

• It diffuses from a high to low concentration

• After 5 minutes, the bromine gas will have diffused from the bottom jar until it is evenly spread throughout both jars

  • The same can be said for the air, although it is less obvious as it is colourless