Calculate the Energy Change for the Formation of MgBr₂(s)from Its

question 1

Multiple Choice

Calculate the energy change for the formation of MgBr₂(s) from its elements in their standard states: Mg(s) + Br₂(l) → MgBr₂(s) ?
Mg(s) → Mg(g) +147.1 kJ/mol
Mg(g) → Mg⁺(g) + e^- +737.8 kJ/mol
Mg⁺(g) → Mg²⁺(g) + e^- +1451 kJ/mol
Br₂(l) → Br₂(g) +30.9 kJ/mol
1/2 Br₂(g) → Br(g) +112.0 kJ/mol
Br(g) + e^- → Br^-(g) -325.0 kJ/mol
MgBr₂(s) → Mg²⁺(g) + 2Br^-(g) +2440 kJ/mol

• A)-150.8 kJ/mol
• B)-286.0 kJ/mol
• C)-499.2 kJ/mol
• D)-5682 kJ/mol

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