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 Calcium Hypochlorite
Decomposition of Carbonic Acid
Decomposition of Nitrous Oxide (Laughing Gas)
Decomposition of Barium Peroxide
Decomposition of Sodium Bicarbonate
Decomposition of Water (Electrolysis)
Decomposition of Silver Chloride (Photodecomposition)
Thermal Decomposition of Lead(IV) Oxide
Decomposition of Sodium Azide (Airbag Reaction)
Decomposition of Ammonium Nitrate
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).