Given 2Al(s)+ (3/2)O₂(g) $\rarr$ Al₂O₃(s) $\Delta$ H°_f = -1,670 KJ/mol for Al₂O₃ (S)

question 99

Multiple Choice

Given 2Al(s) + (3/2) O₂(g) $\rarr$ Al₂O₃(s) , $\Delta$ H°_f = -1,670 kJ/mol for Al₂O₃ (s) . Determine $\Delta$ H° for the reaction 2Al₂O₃(s) $\rarr$ 4Al(s) + 3O₂(g) .

• A)3,340 kJ/mol
• B)1,670 kJ/mol
• C)-3,340 kJ/mol
• D)-1,670 kJ/mol
• E)-835 kJ/mol

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