Thermal Decomposition of Sulfuric Acid

H2SO4 → H2O + SO3

Descripción general

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

Rol Sustancia Coeficiente Estado
Reactivo Sulfuric Acid H₂SO₄ 1 (l)
Producto Water H₂O 1 (g)
Producto Sulfur Trioxide SO₃ 1 (g)

Ejemplo cotidiano

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

Importancia industrial

Relevante en el diseño y control de torres de absorción y reactores en la fabricación industrial de ácido sulfúrico.

Propiedades

Tipo
Decomposition
Reversible
Sí
Energía
Endotérmico
ΔH
177,0 kJ/mol

Reacciones relacionadas

Decomposition of Ammonium Nitrate Decomposition of Calcium Hypochlorite Decomposition of Carbonic Acid Decomposition of Iron(II,III) Oxide (Direct Reduction) Decomposition of Nitrous Oxide (Laughing Gas) Decomposition of Barium Peroxide Decomposition of Sodium Bicarbonate Decomposition of Water (Electrolysis) Thermal Decomposition of Copper(II) Carbonate Cracking of Octane (Thermal Cracking)

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.