Lesson 4, Topic 1
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What id diffusion ?
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Diffusion is the spreading of one substance into another due to the random motion of the particles
Diffusion and the kinetic particle theory
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