Calculate the Lattice Energy for MgCl₂(s)using a Born-Haber Cycle and the Following

question 138

Multiple Choice

Calculate the lattice energy for MgCl₂(s) using a Born-Haber cycle and the following information: MgCl₂(s) → Mg²⁺(g) + 2 Cl^-(g) ?
Mg(s) + Cl₂(g) → MgCl₂(s) -641.6 kJ/mol
Mg(s) → Mg(g) +147.1 kJ/mol
Mg(g) → Mg⁺(g) + e^- +737.8 kJ/mol
Mg⁺(g) → Mg²⁺(g) + e^- +1451.0 kJ/mol
1/2 Cl₂(g) → Cl(g) +121.7 kJ/mol
Cl(g) + e^- → Cl^-(g) -348.6 kJ/mol

• A)+641.6 kJ/mol
• B)+1240.5 kJ/mol
• C)+1882.1 kJ/mol
• D)+2523.7 kJ/mol

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