Interactive lesson on diffusion and evaporation
Follow this interactive lesson to help you undertand the basics of diffusion and evaporation at the level of molecules
- DIFFUSION
We now accept the idea that everything is made up of particles. It is difficult explain how the same substance can exist in three states solid, liquid and gas without using the idea of particles. Diffusion is also difficult explain without the idea of particles.
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How would this enable you to smell the perfume?
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- What happens to the potassium manganate (VII) in the solution.
- Can you explain why it is happening?
- Why is diffusion important in the lungs?
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- Do you think heating the potassium manganate (vii) solution will make it spread slower or faster?
- Can you explain your answer?
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- What happens when sugar is put in water?
Evaporation is also difficult to explain without referring to the idea of particles
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- What is evaporation? Is evaporation different from boiling?
- How can evaporation be speeded up?
- Can you draw a diagram to show diffusion and evaporation