Which of the following reactions is associated with the lattice energy of RbI (ΔH°_latt)? A) Rb(s) + I₂(g) → RbI(s) B) RbI(s) → Rb⁺(g) + I⁻(g) C) RbI(s) → Rb(s) + I₂(g) D) RbI(s) → Rb⁺(aq) + I⁻(aq) E) Rb⁺(g) + I⁻(g) → RbI(s)

Question

Quizplus · Accepted Answer

The lattice energy is the energy required to break apart one mole of a solid ionic compound into its constituent ions in the gas phase. Therefore, the reaction that represents this process is the one where the solid RbI dissociates into its constituent ions in the gas phase. This is represented by Option E: Rb⁺(g) + I⁻(g) → RbI(s).

Which of the Following Reactions Is Associated with the Lattice