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In this video you will learn about the mixing of substances, which is known in technical terms as diffusion. You can explain diffusion using the so-called Brownian motion. All particles are always in motion - without direction - without destination! The higher the temperature, the faster the particles move. This is part 3 of a video series that explains the content of the first year of school chemistry - my goal: to take your chemical understanding to a new level and help you achieve better grades in chemistry. Video content: 0:00 Intro 0:24 Smells spread throughout the room 0:51 Diffusion - tea in water 3:14 Brownian motion - particles move 4:05 Temperature dependence: the higher the temperature, the faster the particles move 5:30 Checker question