Determine the energy required to dissociate a Na Cl molecule into a Na and a Cl atom, given that the electron affinity of Cl is 3.70 eV, the first ionization potential of Na is 5.14 eV, and the separation of Na Cl at equilibrium is 0.236 nm. (a) 6.10 eV (b) 5.57 eV (c) 4.66 eV (d) 3.29 eV