Chemistry anyone?

Question

Estimate DH for the reaction: C2H6(g) + Cl2(g) ---> C2H5Cl(g) + HCl(g) given the following average bond energies in kJ/mol C-C, 348; C-H, 414; Cl-Cl, 242; C-Cl, 327; H-Cl, 431

a. ) -113 kJ/mol
b. ) -68 kJ/mol
c. ) -102 kJ/mol
d. ) -344 kJ/mol
e. ) 276 kJ/mol

Answer 1

It's:

Sum of bond enthalpies of product - Sum of bond enthalpies of reactants