Using the following data: Enthalpy of sublimation:

Using the following data: Enthalpy of sublimation of Ca = +178.2 kJ mol–1 Enthalpy of dissociation of Cl2 = +243.4 kJ mol–1 Enthalpy of formation of CaCl2 = –795.8 kJ mol–1 First and second Ionization energies for Ca are +590 kJ mol–1 and +1145 kJ mol–1 respectively. The electron affinity of Cl = –348.7 kJ mol–1 Determine the lattice energy of CaCl2.