Formation of Iron(III) Oxide

4Fe + 3O2 → 2Fe2O3

概要

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.

参加者

役割 物質 係数 状態
反応物 Oxygen O 3 (g)
反応物 Iron Fe 4 (s)
生成物 Iron(III) Oxide Fe₂O₃ 2 (s)

日常の例

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

産業上の重要性

鉄の酸化の理解は建設・製造業の防食に不可欠である。世界経済は年間約2.5兆ドルの腐食コストを被っている。酸化鉄は顔料（ベンガラ）、磁気記録媒体にも利用される。

特性

タイプ
Synthesis
可逆的
いいえ
エネルギー
発熱性
ΔH
-1648.4 kJ/mol

関連する反応

Formation of Calcium Hydroxide Formation of Carbon Monoxide Formation of Nitrogen Dioxide Formation of Potassium Chloride Formation of Sodium Bicarbonate Formation of Sodium Peroxide Formation of Silicon Dioxide Formation of Tungsten Carbide Formation of Copper(II) Sulfide Fischer-Tropsch Synthesis (General)

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.