Decomposition of Water (Electrolysis)

2H2O → 2H2 + O2

概要

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.

参加者

役割 物質 係数 状態
反応物 Water H₂O 2 (l)
生成物 Oxygen O 1 (g)
生成物 Hydrogen H 2 (g)

日常の例

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

産業上の重要性

水の電気分解は、炭素排出なしで燃料電池、アンモニア合成、鉄鋼生産のための水素を生産する、グリーン水素経済の中心です。

特性

タイプ
Decomposition
可逆的
はい
エネルギー
吸熱性
ΔH
571.6 kJ/mol

関連する反応

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.