Thermite Reaction

2Al + Fe2O3 → Al2O3 + 2Fe

概要

Aluminum reduces iron(III) oxide in this extremely exothermic redox reaction, reaching temperatures above 2500 C. Aluminum is oxidized from Al⁰ to Al³⁺ (losing 3 electrons) while iron is reduced from Fe³⁺ to Fe⁰. Once ignited, the reaction is self-sustaining and produces molten iron.

参加者

役割 物質 係数 状態
反応物 Iron(III) Oxide Fe₂O₃ 1 (s)
反応物 Aluminum Al 2 (s)
生成物 Aluminum Oxide Al₂O₃ 1 (s)
生成物 Iron Fe 2 (l)

日常の例

Railroad workers use thermite welding to join rail sections in the field, pouring molten iron into a mold around the rail joint.

産業上の重要性

テルミット溶接は鉄道レールの補修、パイプライン溶接、金属切断に使用される。極めて高い温度により特殊な冶金用途に有用である。

特性

タイプ
Redox
可逆的
いいえ
エネルギー
発熱性
ΔH
-851.5 kJ/mol

関連する反応

Iron(II) to Iron(III) Oxidation by Oxygen Bleaching with Sodium Hypochlorite Copper Reduction of Silver Ion Aqua Regia Dissolving Gold Cerium(IV) Reduction by Iron(II) Chlorine Oxidation of Bromide Copper Oxidation by Nitric Acid Hypochlorite Oxidation of Hydrogen Peroxide Hydrogen Peroxide as Oxidizing Agent (Acidic) Displacement of Hydrogen from Acid by Magnesium

Frequently Asked Questions

What is the equation for Thermite Reaction?
The balanced equation is: 2Al + Fe₂O₃ → Al₂O₃ + 2Fe.
What type of reaction is Thermite Reaction?
Thermite Reaction is a redox reaction.
Is Thermite Reaction exothermic or endothermic?
Thermite Reaction is exothermic (releases energy). The enthalpy change (ΔH) is -851.5 kJ/mol.