Calculate the lattice formation enthalpy (lattice energy) of the lattice for LiF(s), in kJ/mol, given the following information:

Process

Change in Energy (H)

Sublimation energy for Li(s)

161 kJ/mol

Enthalpy of formation of F(g)

77 kJ/mol

First ionization energy of Li(g)

520 kJ/mol

Electron affinity of F(g)

-328 kJ/mol

Enthalpy of formation of LiF(s)

-617 kJ/mol