Decomposition of Hydrogen Peroxide

2H2O2 → 2H2O + O2

Tổng quan

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.

Người tham gia

Vai trò Chất Hệ số Trạng thái
Chất phản ứng Hydrogen Peroxide H₂O₂ 2 (l)
Sản phẩm Oxygen O 1 (g)
Sản phẩm Water H₂O 2 (l)

Ví dụ thực tế

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

Tầm quan trọng công nghiệp

Understanding H2O2 decomposition is critical for safe storage and handling. Concentrated hydrogen peroxide can decompose explosively. The reaction is also used to generate oxygen in emergency breathing systems.

Tính chất

Loại
Decomposition
Thuận nghịch
Không
Năng lượng
Tỏa nhiệt
ΔH
-196,0 kJ/mol
Chất xúc tác
Manganese dioxide (MnO₂) or catalase enzyme

Phản ứng liên quan

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).