Problem: The lattice energies of FeCl3, FeCl2, and Fe2O3 are (in no particular order) -2631, -5359, and -14,774 kJ/mol. Match the appropriate formula to each lattice energy. Explain.

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Use the Ionic Bond Energy (Lattice Energy) Equation to estimate which of the compounds would have the highest or lowest lattice energy.

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The lattice energies of FeCl3, FeCl2, and Fe2O3 are (in no particular order) -2631, -5359, and -14,774 kJ/mol. Match the appropriate formula to each lattice energy. Explain.