Final answer:
Bond energy is the amount of energy required to break a chemical bond, while energy of reactions is the energy change that occurs during a chemical reaction. Higher bond energies indicate stronger and less reactive bonds, while lower bond energies indicate weaker and more reactive bonds.
Step-by-step explanation:
Bond energy refers to the amount of energy required to break a covalent bond between two atoms, and is measured in joules or kilojoules. When a chemical bond is broken, energy is absorbed, while when a chemical bond is formed, energy is released. The energy change in a chemical reaction can be estimated by analyzing the bonds broken and formed during the reaction.
The energy of a chemical bond is indicated by the bond enthalpy, which is the energy required to break a chemical bond. The same amount of energy is released when a chemical bond is formed. Higher bond energies indicate stronger bonds and more stable molecules, while lower bond energies indicate weaker bonds and more reactive molecules.
For example, if a reaction involves breaking strong bonds and forming weaker bonds, more energy will be absorbed during the reaction, resulting in an endothermic reaction. On the other hand, if a reaction involves breaking weaker bonds and forming stronger bonds, more energy will be released during the reaction, resulting in an exothermic reaction.