Decomposition of Hydrogen Peroxide

2H2O2 → 2H2O + O2

概要

Hydrogen peroxide spontaneously decomposes into water and oxygen gas. The reaction is dramatically accelerated by catalysts like manganese dioxide, potassium iodide, or the enzyme catalase found in blood and liver tissue. This is a classic demonstration reaction in chemistry education.

参加者

役割 物質 係数 状態
反応物 Hydrogen Peroxide H₂O₂ 2 (l)
生成物 Oxygen O 1 (g)
生成物 Water H₂O 2 (l)

日常の例

The fizzing when hydrogen peroxide is applied to a wound occurs because catalase in blood rapidly decomposes H2O2 into water and oxygen bubbles.

産業上の重要性

H₂O₂の分解の理解は、安全な貯蔵と取り扱いに重要です。濃縮過酸化水素は爆発的に分解する可能性があります。この反応は緊急呼吸システムでの酸素生成にも使用されています。

特性

タイプ
Decomposition
可逆的
いいえ
エネルギー
発熱性
ΔH
-196.0 kJ/mol
触媒
Manganese dioxide (MnO₂) or catalase enzyme

関連する反応

Decomposition of Ammonium Nitrate Decomposition of Calcium Hypochlorite Decomposition of Carbonic Acid Decomposition of Iron(II,III) Oxide (Direct Reduction) Decomposition of Nitrous Oxide (Laughing Gas) Decomposition of Barium Peroxide Decomposition of Sodium Bicarbonate Decomposition of Water (Electrolysis) Thermal Decomposition of Copper(II) Carbonate Cracking of Octane (Thermal Cracking)

Frequently Asked Questions

What is the equation for Decomposition of Hydrogen Peroxide?
The balanced equation is: 2H₂O₂ → 2H₂O + O₂.
What type of reaction is Decomposition of Hydrogen Peroxide?
Decomposition of Hydrogen Peroxide is a decomposition reaction.
Is Decomposition of Hydrogen Peroxide exothermic or endothermic?
Decomposition of Hydrogen Peroxide is exothermic (releases energy). The enthalpy change (ΔH) is -196.0 kJ/mol.
What conditions are needed for Decomposition of Hydrogen Peroxide?
This reaction requires a catalyst (Manganese dioxide (MnO₂) or catalase enzyme).