Aluminum oxide can be reduced to aluminum metal using carbon,the other reaction product being carbon monoxide.What is the enthalpy change if 12.50 g of aluminum is produced by this method? Substance ΔH°_f(kJ/mol)
CO(g) -110.5
Al₂O₃(s) -1669.8

Question

Quizplus · Accepted Answer

The enthalpy change for the reaction can be calculated using the following equation:ΔH° = ΣΔH°_f(products) - ΣΔH°_f(reactants)ΔH° = [ΔH°_f(Al) + ΔH°_f(CO)] - [ΔH°_f(Al₂O₃)]ΔH° = [0 kJ/mol + (-110.5 kJ/mol)] - (-1669.8 kJ/mol)ΔH° = 310.0 kJTherefore, the enthalpy change for the reaction is 310.0 kJ.

Aluminum Oxide Can Be Reduced to Aluminum Metal Using Carbon,the