Calculate the lattice energy of CaCl₂ using a Born- Haber cycle and data from Appendices F and L and Table 7.5.

Data given in Table 7.5

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TABLE 7.5 2nd Period 1st 2nd 3rd 3rd Period 1st 2nd 3rd 4th Period 1st 2nd 3rd First, Second, and Third lonization Energies for the Main Group Elements in Periods 2-4 (kJ/mol) Be B N O F Ne 801 1402 1314 1681 2080 2427 2856 3388 3374 3952 3660 4578 5300 6050 6122 Al cl 577 1251 1817 2297 2745 3826 Li 513 7298 11815 Na 496 4562 6912 K 419 3051 4411 899 1757 14848 Mg 738 1451 7732 Ca 590 1145 4910 Ga 579 1979 2963 с 1086 2352 4620 Si 787 1577 3231 Ge 762 1537 3302 P 1012 1903 2912 As 947 1798 2735 S 1000 2251 3361 Se 941 2044 2974 Br 1140 2104 3500 Ar 1520 2665 3928 Kr 1351 2350 3565