Chapter 8, Problem 2E

Draw a curve that describes the energy of a system with H and Cl atoms at varying distances. Then, find the minimum energy of this curve two ways.

(a) Use the bond energy found in Table 8.1 to calculate the energy for one single HCl bond (Hint: How many bonds are in a mole?)

(b) Use the enthalpy of reaction and the bond energies for ${\text{H}}_2$ and ${\text{Cl}}_2$ to solve for the energy of one mole of HCl bonds.

   ${\text{H}}_2\left(g\right)+{\text{Cl}}_2\left(g\right)\rightleftharpoons 2\text{HCl}\left(g\right)\Delta H_{\text{rxn}}^{°}=-184.7\text{kJ/mol}$