BOND ENERGY
The difference between the energy of a coupled system of particles and the integral energy of these particles in the unbound state is called bond energy. For stable systems bond energy has negative value, and the more stable system is, the large the absolute value of its bond energy. The value of the bond energy, if taken with the opposite sign, is equal to the value of minimal work, which is necessary in order to divide the system into the particles constituting it. Thus, bond energy characterizes resistance power of a system. Usually this energy is associated with mole (that is, with the Avogadro’s number NA of bonds) and expressed in kilojoules or kilocalories.