Decomposition of Water (Electrolysis)

2H2O → 2H2 + O2

Descripción general

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.

Participantes

Rol Sustancia Coeficiente Estado
Reactivo Water H₂O 2 (l)
Producto Oxygen O 1 (g)
Producto Hydrogen H 2 (g)

Ejemplo cotidiano

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

Importancia industrial

La electrólisis del agua es central para la economía del hidrógeno verde, produciendo hidrógeno para pilas de combustible, síntesis de amoníaco y producción de acero sin emisiones de carbono.

Propiedades

Tipo
Decomposition
Reversible
Sí
Energía
Endotérmico
ΔH
571,6 kJ/mol

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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.