Which of the following reactions is associated with the lattice energy of Rb₂S (ΔH°_latt)? A) Rb₂S(s) → 2 Rb⁺(g) + S²⁻(g) B) 2 Rb⁺(aq) + S²⁻(aq) → Rb₂S(s) C) 2 Rb⁺(g) + S²⁻(g) → Rb₂S(s) D) Rb₂S(s) → 2 Rb⁺(aq) + S²⁻(aq) E) 2 Rb(s) + S₂(g) → Rb₂S(s)

Question

Quizplus · Accepted Answer

Lattice energy is the energy required to completely separate one mole of a solid ionic compound into gaseous ions. Therefore, the correct reaction that represents the lattice energy of Rb₂S would be the one that shows the formation of the solid compound from gaseous ions. The only reaction that fits this description is C: 2 Rb⁺(g) + S²⁻(g) → Rb₂S(s).

Which of the Following Reactions Is Associated with the Lattice