The proton affinity, PA, of ammonia is defined as the change in energy for the reaction: NH4+(g)NH3(g)+H+(g) PA at 0K can be computed from other thermal data through consideration of the Born-Haber cycle (all substances except NH4Cl being gases): in which Elattice represents the lattice energy per mole of crystalline NH4Cl,153kcal/mole. IPH, the ionization energy of a mole of hydrogen atoms is 312kcal/mole, and the electron affinity of chlorine, EAcl, is 92.5kcal/mole. Using 75.1kcal/mole as the heat of formation of solid ammonium chloride, and 10.9kcal/mole as that of NH3(g), and looking up any other energies you may need (aside from the PA of ammonia), calculate PA of NH3. You may neglect contributions from PV work