Construct a Born-Haber cycle for the formation of the hypothetical compound where the...

Construct a Born-Haber cycle for the formation of the hypothetical compound where the sodium ion has a 2+ charge (the 2nd ionization energy for sodium is given in Table 7.2). (a) How large would the lattice energy need to be for the formation of to be exothermic? (b) If we were to estimate the lattice energy of to be roughly equal to that of (2326 kL/mol from Table 8.2), what value would you obtain for the standard enthalpy of formation,