Which of the following reactions is associated with the lattice energy of CaS (ΔH°latt)?
A) Ca(s) + S(s) → CaS(s)
B) CaS(s) → Ca(s) + S(s)
C) Ca2⁺ (aq) + S2⁻ (aq) → CaS(s)
D) Ca2⁺ (g) + S2⁻ (g) → CaS(s)
E) CaS(s) → Ca2⁺ (aq) + S2⁻ (aq)
Answer: D
Chemistry
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