4.3.6 Evaporation and Boiling

Rate of Evaporation

  1. Evaporation is the process of converting a substance (such as water) from its liquid state to its gaseous state at temperature lower than the boiling point of the liquid.
  2. There are several ways of making a liquid evaporate faster:
    1. Increase its temperature 
    2. Increase its surface area 
    3. Pass air through it or across its surface 
    4. Make the liquid into a fine spray
      A spray is made up of millions of tiny liquid droplets with a very large total surface area. The highly curved surfaces make it easier for molecules to escape.