Decomposition of Water (Electrolysis)

2H2O → 2H2 + O2

概述

Water decomposes into hydrogen and oxygen gases when an electric current is passed through it. This electrolysis reaction is the reverse of the synthesis of water. It requires a minimum voltage of 1.23 V at standard conditions, though practical electrolyzers use higher voltages.

参与者

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

日常示例

Green hydrogen production uses renewable electricity to split water, producing clean hydrogen fuel for vehicles and industry.

工业重要性

水电解是绿色氢经济的核心,生产氢气用于燃料电池、合成氨以及无碳排放的钢铁生产。

属性

类型
Decomposition
可逆
是
能量
吸热
ΔH
571.6 kJ/mol

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 Thermal Decomposition of Copper(II) Carbonate Thermal Decomposition of Mercury(II) Oxide Cracking of Octane (Thermal Cracking)

Frequently Asked Questions

What is the equation for Decomposition of Water (Electrolysis)?
The balanced equation is: 2H₂O → 2H₂ + O₂.
What type of reaction is Decomposition of Water (Electrolysis)?
Decomposition of Water (Electrolysis) is a decomposition reaction. It is reversible under certain conditions.
Is Decomposition of Water (Electrolysis) exothermic or endothermic?
Decomposition of Water (Electrolysis) is endothermic (absorbs energy). The enthalpy change (ΔH) is 571.6 kJ/mol.