Bond energy, also known as bond dissociation energy, is the amount of energy required to break a specific chemical bond in a molecule, resulting in the separation of the bonded atoms or groups. It is usually measured in kilojoules per mole (kJ/mol) and can be considered an indicator of the strength of a bond; higher bond energy typically indicates a stronger bond.
Bond energy plays a crucial role in chemical reactions, as it helps to predict how much energy will be released or absorbed during the formation or breaking of bonds in reactants and products. It is important to note that bond energy values can vary depending on the molecular environment and the state of the substance (gas, liquid, or solid).