Question

explain why alcohols have higher boiling points than alkanes of comparable molecular weights?​

Answer 1

In alkanes, the only intermolecular forces are van der Waals dispersion forces. Hydrogen bonds are much stronger than these and therefore it takes more energy to separate alcohol molecules than it does to separatealkane molecules. That's the main reason that the boiling points arehigher.

Answer 2

Why alcohol have higher boiling point than corresponding alkanes?

Because Hydrogen bonds are much stronger than these.

Therefore, more energy is required to separate alcohol molecules than to separate alkane molecules.