Why alcohols are higher boiling point compounds than hydrocarbons ethers and aldehydes of corresponding molecular masses but have low boiling point than corresponding acids ?

Explanation

We know that greater the intermolecular hydrogen bonding, greater will be boiling point. In hydrocarbons there is no hydrogen bonding. On the other hand, alcohols have intermolecular hydrogen bonding and hence have high boiling points than hydrocarbons. But acids having stronger intermolecular hydrogen bonding, exist as dimer. It is due to the presence of two electronegative oxygen atoms in the molecule of the acid. Thus, acids have higher boiling points than alcohols. The intermolecular hydrogen bonding in alcohol molecules can be shown as below: