This test describes a distillation process resulting from two changes of state. In detail, students can observe the effect of heating a liquid and the effect of cooling the vapours. Heating will lead to the change from liquid to gas, whereas cooling the vapours in the condenser full of water at ambient temperature leads to a change in opposite direction, that is to condensation. If a mixture of two different substances is poured into the flask, they can be separated according to their different boiling points. In this case, only the substance with lower boiling point becomes vapour and it can be recovered by condensation in the round-bottomed flask.
THEORETICAL – EXPERIMENTAL HANDBOOK