Calculating Energy Changes and Bond Energies in Chemical Reactions

The video explains how to calculate energy changes in chemical reactions by considering the energy required to break bonds and the energy released when bonds are formed. The video also introduces the concept of bond energy, which is the energy needed to make or break a bond between two atoms. The video provides examples of calculations for two reactions, one exothermic and one endothermic, and shows the corresponding reaction profiles. The video concludes by emphasizing the importance of comparing the energy required to break bonds with the energy released when bonds are formed to determine whether a reaction is exothermic or endothermic.