What happens to the boiling point of a substance as the strength of intermolecular forces increases?

As the strength of intermolecular forces increases, the boiling point of a substance also increases. This is because stronger intermolecular forces require more energy to overcome when transitioning from the liquid phase to the gas phase.

Intermolecular forces include hydrogen bonds, dipole-dipole interactions, and London dispersion forces, with hydrogen bonds being the strongest among common types. When these forces are stronger, molecules are held more tightly together. Consequently, more kinetic energy (in the form of heat) must be supplied to break these interactions for the substance to reach its boiling point.

As a result, substances with strong intermolecular forces typically have higher boiling points than those with weaker forces. Therefore, the correct answer reflects this relationship between intermolecular force strength and boiling point.