Name a physical property that indicates hydrogen bonding in organic compounds.

Hydrogen bonding significantly influences the physical properties of organic compounds, particularly their boiling points. Compounds that can form hydrogen bonds typically exhibit higher boiling points compared to similar-sized hydrocarbons that do not engage in hydrogen bonding. This phenomenon occurs because hydrogen bonds are relatively strong intermolecular forces, and more energy (in the form of heat) is required to break these interactions when transitioning from the liquid to the gaseous state.

In contrast, hydrocarbons, which primarily interact through weaker van der Waals forces, demonstrate lower boiling points. The presence of hydrogen bonding directly correlates to an increased amount of energy needed to overcome these intermolecular forces, thus resulting in higher boiling points. The correlations between the ability to hydrogen bond and the physical properties of compounds underline the importance of these interactions in determining boiling and melting points in organic chemistry.