The lattice energy of MgCl² is the energy change for which one of the following processes? A) Mg(s) + Cl₂(g) → MgCl₂(s) B) Mg(g) + 2Cl(g) → MgCl₂(s) C) Mg²⁺(s) + 2Cl^-(g) → MgCl₂(g) D) Mg²⁺(g) + 2Cl^-(g) → MgCl₂(s) E) MgCl₂(aq) → MgCl₂(s)

Question

Quizplus · Accepted Answer

The lattice energy is the energy required to completely separate one mole of a solid ionic compound into gaseous ions. The process in choice D shows the formation of MgCl₂ from its constituent ions, which is the reverse of this process. The lattice energy is an exothermic process, so the reverse process shown in choice D is endothermic. Therefore, choice D represents the correct process for the lattice energy.

The Lattice Energy of MgCl2 Is the Energy Change for Which

The Lattice Energy of MgCl² Is the Energy Change for Which