CHARACTERISTICS OF HYDROGEN-BONDED COMPOUNDS
(1) Abnormally high boiling and melting points
The compounds in which molecules are joined to one another by hydrogen bonds, have unusually high boiling and melting points.
This is because here relatively more energy is required to separate the molecules as they enter the gaseous state or the liquid state.
(2) High solubilities of some covalent compounds
The unexpectedly high solubilities of some compounds containing O, N and F, such as NH3 and CH3OH in certain hydrogen containing solvents are due to hydrogen bonding.
For example,
ammonia (NH3) and methanol (CH3OH) are highly soluble in water as they form hydrogen bonds.
