Decomposition of Hydrogen Peroxide

2H₂O₂ → 2H₂O + O₂

Visão geral

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.

Participantes

Papel	Substância	Coeficiente	Estado
Reagente	Hydrogen Peroxide H₂O₂	2	(l)
Produto	Oxygen O	1	(g)
Produto	Water H₂O	2	(l)

Exemplo do cotidiano

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

Importância industrial

A compreensão da decomposição do H₂O₂ é crítica para armazenamento e manuseamento seguros. O peróxido de hidrogénio concentrado pode decompor-se explosivamente. A reação é também utilizada para gerar oxigénio em sistemas de respiração de emergência.

Propriedades

Tipo: Decomposition
Reversível: Não
Energia: Exotérmico
ΔH: -196,0 kJ/mol
Catalisador: Manganese dioxide (MnO₂) or catalase enzyme

Reações relacionadas

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).