Decomposition of Hydrogen Peroxide

2H2O2 → 2H2O + O2

概述

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.

参与者

角色 物质 系数 状态
反应物 Hydrogen Peroxide H₂O₂ 2 (l)
产物 Oxygen O 1 (g)
产物 Water H₂O 2 (l)

日常示例

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

工业重要性

理解H2O2的分解对安全储存和操作至关重要。浓过氧化氢可发生爆炸性分解。该反应也用于应急呼吸系统中产生氧气。

属性

类型
Decomposition
可逆
否
能量
放热
ΔH
-196.0 kJ/mol
催化剂
Manganese dioxide (MnO₂) or catalase enzyme

相关反应

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).