Formation of Iron(III) Oxide

4Fe + 3O2 → 2Fe2O3

Overview

Iron reacts with oxygen to form iron(III) oxide, commonly known as rust. This oxidation process occurs slowly in the presence of moisture and air. When iron burns in pure oxygen, the reaction is rapid and spectacular, producing bright sparks.

Participants

Role Substance Coefficient State
Reactant Oxygen O 3 (g)
Reactant Iron Fe 4 (s)
Product Iron(III) Oxide Fe₂O₃ 2 (s)

Everyday Example

Rusting of iron nails, cars, and bridges left exposed to air and moisture is this reaction occurring slowly over time.

Industrial Importance

Understanding iron oxidation is crucial for corrosion prevention in construction and manufacturing. Iron oxide is also used as a pigment and in magnetic storage media.

Properties

Type
Synthesis
Reversible
No
Energy
Exothermic
ΔH
-1648.4 kJ/mol

Related Reactions

Fischer-Tropsch Synthesis (General) Formation of Aluminum Oxide 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)

Frequently Asked Questions

What is the equation for Formation of Iron(III) Oxide?
The balanced equation is: 4Fe + 3O₂ → 2Fe₂O₃.
What type of reaction is Formation of Iron(III) Oxide?
Formation of Iron(III) Oxide is a synthesis reaction.
Is Formation of Iron(III) Oxide exothermic or endothermic?
Formation of Iron(III) Oxide is exothermic (releases energy). The enthalpy change (ΔH) is -1648.4 kJ/mol.