Changing State

• 1)a solid is heated, its particles gain more energy

  2)particles vibrate more, which weakens the forces that hold the solid together

  3)At the melting point, the particles have enough energy to break free from their positions - MELTING and the solid turns into a liquid.

  4) a liquid is heated, the particles get even more energy

  5)makes the particles move faster, which weakens and breaks the bonds holding the liquid together

  6)At the boiling point, the particles have enough energy to break their bonds - BOILING (or evaporating) The liquid becomes a gas
• 7) As a gas cools, the particles no longer have enough energy to overcome the forces of attraction between them

  8)Bonds form between the particles

  9) At the boiling point, so many bonds have formed between the gas particles that the gas becomes a liquid - CONDENSING

  10)a liquid cools, the particles have less energy, so move around less.11)not enough energy to overcome the attraction between the particles, so more bonds form between them

  12)At the melting point ,many bonds have formed between the particles that they're held in place. The liquid becomes a solid - FREEZING