Calculate free energy change for the reaction:
`H_(2)(g) + CI_(2)(g) rarr 2H-CI(g)` by using the bond energy and entropy data.
Bond energies of `H-H, CI-CI`, and `H-CI` bonds are `435, 240`, and `430 kJ mol^(-1)`, respectively. Standard entropies of `H_(2),CI_(2)`, and `HCI` are `130.59, 222.95`, and `186.68 J K^(-1) mol^(-1)`, respectively.
