1. The problem statement, all variables and given/known data Draw the Borne Haber cycle for KBr 2. Relevant equations 3. The attempt at a solution so the energy required to make the K into gas is +89kJ/mol and it takes +420kJ/mol to take 1 electron from K it takes +112kJ/mol to make Br a gas it takes -342kJ/mol to give the Br an electron and i was given -392 delta H subscrpit F superscript theta = -392kJ/mol (what does this mean?) how do i calculate the lattice enthalpy? Using Hess's law it should be the sum So is it 89+420+112-342-392???