What is intermolecular hydrogen bonding?

Two types of hydrogen bonding have been recognized: intramolecular means within the same molecule and intramolecular which is between two or more molecules. Due to hydrogen bonding there is an increase in intermolecular aggregation forces which is reflected in the boiling point and solubility of the organic compound. 

The compounds involving intermolecular hydrogen bonding have higher boiling point, hence such compounds will have low volatility e.g. , ethanol has low volatility than n-butane (C4H10).

Intermolecular hydrogen bond formation lowers the strength of an acid. For example, HBr is weaker than HI and H2O is weaker than H2S. For a substance to be soluble in water, it should be able to make hydrogen bond with water.

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