Combustion of Hydrogen Gas

2H2 + O2 → 2H2O

Aperçu

Hydrogen gas burns in oxygen to produce water with no carbon-containing products. This makes hydrogen the ultimate clean fuel. The reaction produces a very hot, nearly invisible flame. Hydrogen-oxygen mixtures are explosive within a wide flammability range (4-75% H2 in air).

Participants

Rôle Substance Coefficient État
Réactif Oxygen O 1 (g)
Réactif Hydrogen H 2 (g)
Produit Water H₂O 2 (l)

Exemple du quotidien

Hydrogen fuel cell vehicles like the Toyota Mirai emit only water vapor from the tailpipe, as the hydrogen effectively combusts electrochemically.

Importance industrielle

Hydrogen combustion is central to the hydrogen economy for clean energy. It powers rocket engines (Space Shuttle main engine used liquid H2/O2) and fuel cells.

Propriétés

Type
Combustion
Réversible
Non
Énergie
Exothermique
ΔH
-571,6 kJ/mol

Réactions associées

Combustion of Carbon Monoxide Combustion of Ethylene Combustion of Glycerol Combustion of Methanol Combustion of Phenol Combustion of Naphthalene Combustion of Methane Combustion of Octane (Gasoline) Combustion of Cyclohexane Combustion of Benzene

Frequently Asked Questions

What is the equation for Combustion of Hydrogen Gas?
The balanced equation is: 2H₂ + O₂ → 2H₂O.
What type of reaction is Combustion of Hydrogen Gas?
Combustion of Hydrogen Gas is a combustion reaction.
Is Combustion of Hydrogen Gas exothermic or endothermic?
Combustion of Hydrogen Gas is exothermic (releases energy). The enthalpy change (ΔH) is -571.6 kJ/mol.