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tice energy of Ca O to be -800 kJ.mol . Discuss why the second scenario is less favored in enthalpy terms. 6.27 Construct Born-Haber cycles for the theoretical ompounds NaCl2 and NaCl3. Calculate the enthalpy of for- mation for both of these two compounds using information from the data tables in the appendices plus the following values: theoretical lattice energy, NaCl2- 2500 kJ mol 1 theoretical lattice energy, NaCl, - -5400 kJ mol 1 second ionization energy (IE), Na = 4569 kJ-mol-1, third IE, Na = 6919 kJ mol 1. Compare the cycles and suggest why NaCl2 and NaCl are not the preferred products. 6.28 The lattice energy of sodium tetrahydridoborate(I NaBHs, is 2703 kJ.mol 1. Using additional data from the appendices calculate th II),
tice energy of Ca O to be -800 kJ.mol . Discuss why the second scenario is less favored in enthalpy terms. 6.27 Construct Born-Haber cycles for the theoretical ompounds NaCl2 and NaCl3. Calculate the enthalpy of for- mation for both of these two compounds using information from the data tables in the appendices plus the following values: theoretical lattice energy, NaCl2- 2500 kJ mol 1 theoretical lattice energy, NaCl, - -5400 kJ mol 1 second ionization energy (IE), Na = 4569 kJ-mol-1, third IE, Na = 6919 kJ mol 1. Compare the cycles and suggest why NaCl2 and NaCl are not the preferred products. 6.28 The lattice energy of sodium tetrahydridoborate(I NaBHs, is 2703 kJ.mol 1. Using additional data from the appendices calculate th II),
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