States of Matter

• States of matter

  the three states of matter are solid, liquid and gas.
• Changes of state

  melting and freezing occur at the melting point
• Changes of state

  boiling and condensing take place at the boiling point
• Changes of state

  The amount of energy needed to change state depends on the strength of the forces between the particles of the substance
• Changes of state

  The stronger the forces between the particles, the higher the melting and boiling point of the substance.
• Changes of state

  The nature of the particles involved depends on the type of bonding and structure of the substance
• Limitations of the particle model of matter

  • there are no forces
  • all particles are represented as spheres
  • the spheres in the model are solid