Evaporation is the process of change of liquid state into gaseous state upon heating. The liquid molecules when heated gain thermal energy and become highly exited due to the conversion of thermal energy into kinetic energy. Thus the molecules separate from the liquid in the form of gaseous vapours.
Condensation is just the opposite of Evaporation. The change of gaseous state into liquid state is termed as condensation. The gaseous molecules lose heat to the atmosphere and condense to form liquid.
