Lesson 3, Topic 1
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What is diffusion

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Diffusion is the spreading of one substance into another due to the random motion of the particles

  • Diffusion is explained by the kinetic particle theory. Particles collide randomly with each other leading to complete mixing of the particles

  • Diffusion in gases is faster than diffusion in liquids because the particles in gases move faster

  • Diffusion does not happen in solids because the particles are fixed in position¬†

  • The overall movement of particles is from where they are more concentrated to where they are less concentrated