Aluminum Forms a Layer of Aluminum Oxide When Exposed to Air

question 13

Multiple Choice

Aluminum forms a layer of aluminum oxide when exposed to air which protects the bulk metal from further corrosion. 4Al(s) + 3O₂(g) $\rarr$ 2Al₂O₃(s)
Calculate $\Delta$ G° for this reaction, given that $\Delta$ G°_f of aluminum oxide is -1576.4 kJ/mol.

• A)-3152.8 kJ/mol
• B)-1576.4 kJ/mol
• C)-788.2 kJ/mol
• D)1576.4 kJ/mol
• E)3152.8 kJ/mol

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