Final answer:
Nonane has a higher boiling point compared to 2,3,4-trifluoropentane because nonane has longer carbon chains, which results in stronger London dispersion forces.
Step-by-step explanation:
The boiling point of a compound is influenced by its intermolecular forces. Nonane has a higher boiling point compared to 2,3,4-trifluoropentane because nonane has longer carbon chains, which results in stronger London dispersion forces. The larger the molecule, the larger the dispersion forces and the higher the boiling point. In contrast, the presence of fluorine in 2,3,4-trifluoropentane does not significantly affect the boiling point due to the nonpolar nature of the molecule.