Electrolysis of Water
2H2O → 2H2 + O2
Genel Bakış
An electric current passed through water splits it into hydrogen gas at the cathode and oxygen gas at the anode. The minimum voltage required is 1.23 V (thermodynamic), but practical electrolyzers operate at 1.8–2.0 V due to overpotential. A small amount of electrolyte (acid, base, or salt) is needed to make water conductive.
Katılımcılar
| Rol | Madde | Katsayı | Hal |
|---|---|---|---|
| Reaktan | Water H₂O | 2 | (l) |
Günlük Örnek
Green hydrogen production uses renewable electricity to electrolyze water, producing clean fuel for vehicles and industry.
Endüstriyel Önemi
Water electrolysis produces about 4% of the world's hydrogen. Green hydrogen from electrolysis is projected to reach $1.5/kg by 2030.
Özellikler
- Tür
- Electrochemical
- Geri Dönüşümlü
- Evet
- Enerji
- Endotermik
- ΔH
- 572,0 kJ/mol
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Frequently Asked Questions
What is the equation for Electrolysis of Water?
The balanced equation is: 2H₂O → 2H₂ + O₂.
What type of reaction is Electrolysis of Water?
Electrolysis of Water is a electrochemical reaction. It is reversible under certain conditions.
Is Electrolysis of Water exothermic or endothermic?
Electrolysis of Water is endothermic (absorbs energy). The enthalpy change (ΔH) is 572.0 kJ/mol.