Decomposition of Water (Electrolysis)

2H2O → 2H2 + O2

개요

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.

참여 물질

역할 물질 계수 상태
반응물 Water H₂O 2 (l)
생성물 Oxygen O 1 (g)
생성물 Hydrogen H 2 (g)

일상 속 예시

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

산업적 중요성

물 전기분해는 그린 수소 경제의 핵심으로, 탄소 배출 없이 연료 전지, 암모니아 합성, 그리고 철강 생산을 위한 수소를 생산합니다.

성질

유형
Decomposition
가역 반응
예
에너지
흡열
ΔH
571.6 kJ/mol

관련 반응

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.