What is heat of evaporation? Definition and explanation ...
The Heat of vaporization respectively. evaporation is the heat energy required to convert a chemical substance, or a chemical mixture, from the liquid to the gaseous state.
For example, to evaporate a chemical substance, the boiling point of the element must be exceeded. The element with the highest heat of vaporization is therefore the transition metal tungsten, precisely because of its enormously high boiling point of about 6000 ° C.
Furthermore, the heat of vaporization is strongly dependent on the binding forces between the atoms. In order for a chemical mixture to become gaseous, the bonds between the atoms or molecules must first be 'split'. Which bonds are that, depends on the respective substance mixture that is to be evaporated. In question are both intramolecular interactions such as ionic bonding, metallic bonding and covalent bonding, as well as intermolecular interactions such as hydrogen bonding, van der Waals forces or dipole-dipole forces.