Recall: lattice energy: energy released when gaseous ions form an ionic solid
A+(g) + B–(g) → AB(g)
The lattice energy of CaF2 is the energy change for which one, if any, of the following processes?
A. Ca2+(s) + 2F-(g) → CaF2(g)
B. CaF2(g) → CaF2(s)
C. Ca(g) + 2F(g) → CaF2(s)
D. CaF2(aq) → CaF2(s)
E. none of these choices is correct
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