Formation of Aluminum Oxide
4Al + 3O2 → 2Al2O3
Overview
Aluminum reacts with oxygen to form aluminum oxide (alumina). While aluminum appears resistant to corrosion, it actually oxidizes instantly in air, forming a thin protective oxide layer that prevents further reaction. Powdered aluminum burns vigorously in oxygen.
Participants
| Role | Substance | Coefficient | State |
|---|---|---|---|
| Reactant | Oxygen O | 3 | (g) |
| Reactant | Aluminum Al | 4 | (s) |
| Product | Aluminum Oxide Al₂O₃ | 2 | (s) |
Everyday Example
The dull gray coating on aluminum cans and foil is a thin layer of aluminum oxide that protects the metal from further corrosion.
Industrial Importance
Aluminum oxide is used as an abrasive (corundum), in ceramics, as catalyst support material, and as the starting material for aluminum metal production via the Hall-Heroult process.
Properties
- Type
- Synthesis
- Reversible
- No
- Energy
- Exothermic
- ΔH
- -3351.4 kJ/mol
Related Reactions
Fischer-Tropsch Synthesis (General)
Formation of Ammonia (Haber Process)
Formation of Barium Oxide
Formation of Barium Sulfate
Formation of Beryllium Oxide
Formation of Cadmium Oxide
Formation of Calcium Carbonate from Oxides
Formation of Calcium Hydroxide
Formation of Calcium Oxide (Quicklime)
Formation of Carbon Dioxide from Elements
Frequently Asked Questions
What is the equation for Formation of Aluminum Oxide?
The balanced equation is: 4Al + 3O₂ → 2Al₂O₃.
What type of reaction is Formation of Aluminum Oxide?
Formation of Aluminum Oxide is a synthesis reaction.
Is Formation of Aluminum Oxide exothermic or endothermic?
Formation of Aluminum Oxide is exothermic (releases energy). The enthalpy change (ΔH) is -3351.4 kJ/mol.