Describe the differences between the energy spacing and movement of molecules in a solid a liquid and a gas (5 marks)
Solid: In a solid, the molecules are held in a fixed position and have very little movement. The energy spacing between molecules is very close, and the molecules vibrate in place.
Liquid: In a liquid, the molecules are still close together, but they are able to move around each other. The energy spacing between molecules is slightly larger than in a solid, and the molecules can move freely.
Gas: In a gas, the molecules are much further apart and have a lot of movement. The energy spacing between molecules is much larger than in a solid or liquid, and the molecules move rapidly in all directions.