In Which of the Following Processes Does the Enthalpy Change

Multiple Choice

In which of the following processes does the enthalpy change (ΔH) directly represent the magnitude of the lattice energy of KCl(s) ?

A) Cl ₂(g) + 2K(s) → 2KC (s)
B) KCl(s) → K ⁺(aq) + Cl ⁻ (aq)
C) KCl(s) → K ⁺(g) + Cl ⁻(g)
D) KCl(s) → K(s) + Cl ⁻(g)
E) KCl(s) → K(s) + Cl(g)