Explain how you would calculate the total change in bond energy for the reaction H2 + Cl2 -> 2HCl. How would you know if the reaction was endothermic or exothermic?

Answer 1

To calculate the total change in bond energy for the reaction H2 + Cl2 -> 2HCl, you would need to calculate the bond energy of each of the reactants and products. The bond energy of a molecule is the energy required to break the bonds in the molecule. The total change in bond energy for the reaction is then the difference between the sum of the bond energies of the reactants and the sum of the bond energies of the products.

If the total change in bond energy is positive, then the reaction is endothermic, meaning that energy is absorbed from the environment. If the total change in bond energy is negative, then the reaction is exothermic, meaning that energy is released into the environment.