Why can distillation be used instead of evaporation

Evaporation is the process of changing a liquid into its vapor stage. The word “evaporation” is specifically used when the vaporization happens from the surface of the liquid. Liquid vaporization can also happen at the boiling point where evaporation happens from whole liquid mass, but then it is not called as evaporation. Evaporation can be influenced by various factors like concentration of other substances in the air, surface area, pressure, temperature of the substance, density, flow rate of air etc.

30litre of li2o is 1.0002mole approximately 1 mole