5.7 and 5.8

5.7 and 5.8 Starter

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What are the 6 processes shown by the arrows?

Melting Solid --> Liquid

Evaporation Liquid --> Gas

Sublimation Gas <---> Solid

Condensation Gas --> Liquid

Freezing Liquid --> Solid

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5.7 understand that a substance can change state from solid to liquid by the process of melting

·         5.8 understand that a substance can change state from liquid to gas by the process of evaporation or boiling

·         Questions from Collins p.112

·         Answer in Bullet Points!

Q1) a. Solids keep the shape because their particles are only vibrating in a fixed position. This means that their shape is simply "fixed" as well as particles are not free to move around. As with liquids, particles are able to slide over each other, and are freely to move around in gases , therefore they do not have a fixed shape.

b. Solids and liquids have a fixed volume because the particles are packed closely together. However, the particles are widely spaced in gas, so therefore they extend to fill 

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Use following pages from Collins as a resource to help you