Lattice energy represents the union of a gaseous cation and a gaseous anion in the formation of an ionic solid.
CaCl2 is formed from Ca(s) and Cl2(g). The formation reaction is:
Ca(s) + Cl2(g) → CaCl2(s)
To find the lattice energy (U), we need the following values which can be found in books or reliable internet sources:
Using data from Appendix C, Figure 7.9, and Figure 7.11 (all in the textbook) and the value of the second ionization energy for Ca, 1145, calculate the lattice energy of CaCl2.
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