Solid has fixed shape, fixed volume and high density
Liquid has unfixed shapes, fixed volume and has moderate density
Gas has unfixed shape, unfixed volume and has low density
The inter-conversation of states.
Melting.
When a solid is heated, heat is absorbed causing particles to increase in energy and vibrate.
Boiling.
At boiling point, particles get enough energy to overcome the forces holding them together, causing them to break away from the liquid to form a gas
Evaporation.
Evaporation takes place at the surface of the liquid.
Evaporation takes place at all temperature.
Freezing.
At freezing point, liquid turns to solid.
Heat energy is given out
Temperature stays constant while liquid freezes as heat energy is released when particles slow down to take up fixed position in the solid.
Sublimation.
Process whereby inter-conversation between solid to gaseous state without passing through the liquid state.
Heat energy is absorbed when solid changes to gas
Heat is given out when gas change into a solid
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