What Is ΔH°_rxn for the Reaction 2Al₂O₃(s) → 4Al(s)

question 108

Multiple Choice

What is ΔH°_rxn for the reaction 2Al₂O₃(s) → 4Al(s) + 3O₂(g) ? ΔH°_f(Al₂O₃(s) ) = -1670 kJ/mol

• A) 3340 kJ/mol
• B) 1670 kJ/mol
• C) -3340 kJ/mol
• D) -1670 kJ/mol
• E) -835 kJ/mol