The carbonyl group gives aldehydes higher boiling points than alkanes of similar mass.

Name: The carbonyl group gives aldehydes higher boiling points than alkanes of similar mass.
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The carbonyl group (C=O) is a polar functional group, which increases the intermolecular forces (dipole-dipole forces) between aldehyde molecules. This increase in intermolecular forces results in higher boiling points compared to nonpolar alkanes of similar mass.

The Carbonyl Group Gives Aldehydes Higher Boiling Points Than Alkanes