Why ethanol has higher boiling point than ethane ?

Explanation

Ethanol has higher boiling points than ethane because the polar than ethane because the polar hydroxyl group is responsible for higher boiling points of alcohols. In a bulk of ethanol, large number of ethanol molecules are associated toether by intermolecular hydrogen bonding. More energy is required to break this association to convert the molecules into vapour state. This results in increase in the boiling point. Such type of hydrogen bonding is absent in ethane.