Thermal Decomposition of Sulfuric Acid

H2SO4 → H2O + SO3

Visão geral

Concentrated sulfuric acid decomposes at high temperatures (above 340 C) into water vapor and sulfur trioxide gas. This is the reverse of the hydration reaction that produces sulfuric acid. The equilibrium shifts toward decomposition at high temperatures.

Participantes

Papel Substância Coeficiente Estado
Reagente Sulfuric Acid H₂SO₄ 1 (l)
Produto Water H₂O 1 (g)
Produto Sulfur Trioxide SO₃ 1 (g)

Exemplo do cotidiano

This decomposition is relevant to understanding why concentrated sulfuric acid fumes in hot weather and must be stored properly.

Importância industrial

Este equilíbrio é importante nos processos de concentração de ácido sulfúrico e nos processos de câmara de chumbo e de contacto para fabrico de ácido sulfúrico.

Propriedades

Tipo
Decomposition
Reversível
Sim
Energia
Endotérmico
ΔH
177,0 kJ/mol

Reações relacionadas

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Frequently Asked Questions

What is the equation for Thermal Decomposition of Sulfuric Acid?
The balanced equation is: H₂SO₄ → H₂O + SO₃.
What type of reaction is Thermal Decomposition of Sulfuric Acid?
Thermal Decomposition of Sulfuric Acid is a decomposition reaction. It is reversible under certain conditions.
Is Thermal Decomposition of Sulfuric Acid exothermic or endothermic?
Thermal Decomposition of Sulfuric Acid is endothermic (absorbs energy). The enthalpy change (ΔH) is 177.0 kJ/mol.