Some Basic Concepts of Chemistry

• Change of state
  • A change of state occurs because heat energy breaks the force of attraction between particles. Kinetic energy of the particle increases.

• Melting point
  • The temperature at which a solid melts into a liquid at normal atmospheric pressure.
  • At melting point, the temperature does not change until all solid converts into liquid.

• Latent heat
  • The heat required to break the force of attraction between the particles at transition temperature. This heat becomes confined within the material and is cal…