P 1 Kinetic Theory Solids Liquids and Gases

Solids Consta nt sha p e Talk about Particles! e r a s e

Liquids Liqu id c an f low Talk about Particles! e v o nm

Gases Hav e lo wd Talk about Particles! ens ity Particles are flying around

Talk about Particles! Kinetic Theory No. of Particles Speed There is a range of

Talk about Particles! Evaporation Particles with most energy leave the surface Average Energy of

Talk about Particles! Evaporation Increases when 1. Temperature increases 2. Humidity decreases 3. Surface

Talk about Particles! Questions According to kinetic theory, all matter is made up of

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P 1 Kinetic Theory Solids, Liquids and Gases Evaporation

Solids Consta nt sha p e Talk about Particles! e r a s e c r Fo ! g n stro Particles are locked in fixed position Particles vibrate, close together Particles vibrate more when they get hotter

Liquids Liqu id c an f low Talk about Particles! e v o nm a c s e l c i t d r n a u P aro Particles are in contact with each other Particles move about at random Hotter liquid, the particles move around more

Gases Hav e lo wd Talk about Particles! ens ity Particles are flying around Particles very far apart Forces between particles very small Hotter gases, particles fly faster

Talk about Particles! Kinetic Theory No. of Particles Speed There is a range of speeds of particles Fast particles can escape the surface This reduces the average speed/energy This reduces the temperature of the liquid

Talk about Particles! Evaporation Particles with most energy leave the surface Average Energy of those left Causes behind goes down Cooling Lower Average Energy means Lower Temperature

Talk about Particles! Evaporation Increases when 1. Temperature increases 2. Humidity decreases 3. Surface area increases 4. Air flow over surface increases

Talk about Particles! Questions According to kinetic theory, all matter is made up of small particles. The particles are constantly moving. a) One kilogram of gas has a much larger volume than one kilogram of a solid. Use kinetic theory to explain why. [4] b) The temperature of a liquid in a container decreases as the liquid evaporates. Use kinetic theory to explain why. [3]