Chapter 4, Problem 4.30NP

Use the average bond energies in Table 4.3 I to estimate $A\Delta U$ for the reaction ${\text{C}}_{\text{2}}{\text{H}}_{\text{4}}\left(\text{g}\right)+{\text{H}}_{\text{2}}\left(\text{g}\right)\to {\text{C}}_{\text{2}}{\text{H}}_{\text{6}}\left(\text{g}\right)$. Also calculate $\Delta U_R^{°}$ from the tabulated values of $\Delta H_f^{°}$ for reactant and products (Appendix A, Data Tables). Calculate the percent error in estimating $\Delta U_R^{°}$ from the average bond energies for this reaction.