Calculate the Lattice Energy of Magnesium Sulfide from the Data

question 20

Multiple Choice

Calculate the lattice energy of magnesium sulfide from the data given below. Mg(s) → Mg(g) ΔH° = 148 kJ/mol
Mg(g) → Mg²+(g) + 2e- ΔH° = 2186 kJ/mol
S₈(s) → 8S(g) ΔH° = 2232 kJ/mol
S(g) + 2e- → S2-(g) ΔH° = 450 kJ/mol
8Mg(s) + S₈(s) → 8MgS(s) ΔH° = -2744 kJ/mol
Mg²+(g) + S²-(g) → MgS(s) ΔH°lattice = ?

• A) -3406 kJ/mol
• B) -2720. kJ/mol
• C) 2720. kJ/mol
• D) 3406 kJ/mol
• E) None of these choices are correct.

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