the particle model

• density = mass / volume
• solids and liquids have a high density compared to gasses
• change of state

  • MELTING - solid to a liquid
  • FREEZING - liquid to a solid
  • BOILING - liquid to a gas
  • CONDENSING - gas to a liquid
  • SUBLIMATION - solid to a gas
  • DEPOSITION - gas to a solid
• specific heat capacity

  • amount of energy required to raise the temperature of 1kg of a substance by 1 degree
• specific latent heat

  • amount of energy required to change the state of 1 kg of a substance with no temperature change
• volume is inversely proportional to pressure

  • if pressure doubles / volume halves