Carboxylic acids have higher boiling points than aldehydes, ketones and even alcohols of comparable molecular mass. It is due to their
More extensive association of carboxylic acid via van der Waals force of attraction
Formation of carboxylate ion
Formation of intramolecular H-bonding
Formation of intermolecular H-bonding
Carboxylic acids have higher boiling points than other compounds of comparable molecular mass because they form stable dimers due to extensive intermolecular hydrogen bonding.
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