<Dl> <Dd> D = ΔH = 101.1 kcal / mol = 423.0 kJ / mol = 4.40 eV (per bond) </Dd> </Dl> <Dd> D = ΔH = 101.1 kcal / mol = 423.0 kJ / mol = 4.40 eV (per bond) </Dd> <P> The bond - dissociation energy is sometimes called the bond - dissociation enthalpy (or bond enthalpy), but these terms may not be strictly equivalent . Bond - dissociation enthalpy usually refers to the above reaction enthalpy at 298 K (standard conditions) rather than at 0 K, and differs from D by about 1.5 kcal / mol (6 kJ / mol) in the case of a bond to hydrogen in a large organic molecule . Nevertheless, the term bond - dissociation energy and the symbol D have been used for the reaction enthalpy at 298 K as well . </P> <P> Except for diatomic molecules, the bond - dissociation energy differs from the bond energy . While the bond - dissociation energy is the energy of a single chemical bond, bond energy is the average of all the bond - dissociation energies of the bonds in a molecule . </P>

What is the bond enthalpy of the c-h bond