Combustion of Hydrogen Gas

2H2 + O2 → 2H2O

Visão geral

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).

Participantes

Papel Substância Coeficiente Estado
Reagente Oxygen O 1 (g)
Reagente Hydrogen H 2 (g)
Produto Water H₂O 2 (l)

Exemplo do cotidiano

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

Importância industrial

A combustão do hidrogénio é central na economia do hidrogénio para energia limpa. Alimenta motores de foguetão (o motor principal do Space Shuttle utilizava H₂/O₂ líquidos) e células de combustível.

Propriedades

Tipo
Combustion
Reversível
Não
Energia
Exotérmico
ΔH
-571,6 kJ/mol

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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.