Final answer:
The statement is true; alcohols have higher delta Hvap than alkanes due to strong hydrogen bonding in alcohols versus weaker London dispersion forces in alkanes.
Step-by-step explanation:
True: The alcohol group had an overall higher ΔHvap (enthalpy of vaporization) than the alkane group. This can be explained by the presence of hydrogen bonding in alcohols, which requires more thermal energy to overcome compared to the London dispersion forces present in alkanes. The OH group in alcohols allows for intermolecular hydrogen bonding, which significantly increases the boiling points and ΔHvap values of alcohols relative to alkanes of similar molar masses. Alkanes, being nonpolar, are held together mainly by weaker London dispersion forces and so have lower boiling points and ΔHvap values.