Final answer:
Hydrogen bonds can be broken by either water or heat. The high boiling point of water is due to the presence of hydrogen bonds that require energy to break.
Step-by-step explanation:
Hydrogen bonds are weak bonds that can be broken by either water or heat. Hydrogen bonds occur frequently in water and give rise to its unique properties. For example, the high boiling point of water can be explained by the presence of hydrogen bonds that require energy to break. When water is heated, the higher kinetic energy of the water molecules causes the hydrogen bonds to break, allowing water molecules to escape into the air as gas (steam or water vapor).