A substance’s boiling point is achieved when the vapor pressure of a substance is equal to the environmental pressure surrounding the substance. At this point, particles can overcome intermolecular forces and escape as gas into the surroundings. Consequently, the strength of a substance’s intermolecular forces plays a huge role in the substance’s boiling point. Molecules that are strongly attracted to each other will have very high boiling points. This is because it will take more energy, in the form of heat, to break the bonds between molecules and change the substance from a liquid to a gaseous state.