Hydrogen bonding is a type of intermolecular forces (forces of attraction between molecules). Hydrogen bonding will be exhibited by molecules who have OH, NH, or FH bonds. These forces are especially strong and influence the boiling point and melting point of the substances that contain them. That is why water H2O has an unusually high boiling and melting point. In organic chemistry substances such as alcohol, amines, and carboxylic acids are the ones that will have hydrogen bonding and will have unusually high melting and boiling points.
In general chemistry molecules encountered most commonly that possess Hydrogen bonding are : HF, NH3, H2O, CH3OH.
Intermolecular forces are responsible for many properties of substances and therefore play a very important role in our understanding of chemistry.
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