Formation of Sulfur Trioxide

2SO2 + O2 → 2SO3

Descripción general

Sulfur dioxide reacts with oxygen to form sulfur trioxide in the Contact Process. This reversible reaction requires a vanadium pentoxide catalyst and temperatures around 400-450 C. It is the key step in sulfuric acid manufacturing.

Participantes

Rol Sustancia Coeficiente Estado
Reactivo Oxygen O 1 (g)
Reactivo Sulfur Dioxide SO₂ 2 (g)
Producto Sulfur Trioxide SO₃ 2 (g)

Ejemplo cotidiano

This reaction occurring in the atmosphere from volcanic emissions or industrial pollution contributes to acid rain formation.

Importancia industrial

El Proceso de Contacto es el principal método industrial de producción de ácido sulfúrico, el producto químico más fabricado en el mundo, con más de 200 millones de toneladas al año.

Propiedades

Tipo
Synthesis
Reversible
Sí
Energía
Exotérmico
ΔH
-198,2 kJ/mol
Catalizador
Vanadium(V) oxide (V₂O₅)

Reacciones relacionadas

Formation of Calcium Hydroxide Formation of Carbon Monoxide Formation of Nitrogen Dioxide Formation of Potassium Chloride Formation of Sodium Bicarbonate Formation of Sodium Peroxide Formation of Silicon Dioxide Formation of Tungsten Carbide Formation of Copper(II) Sulfide Fischer-Tropsch Synthesis (General)

Frequently Asked Questions

What is the equation for Formation of Sulfur Trioxide?
The balanced equation is: 2SO₂ + O₂ → 2SO₃.
What type of reaction is Formation of Sulfur Trioxide?
Formation of Sulfur Trioxide is a synthesis reaction. It is reversible under certain conditions.
Is Formation of Sulfur Trioxide exothermic or endothermic?
Formation of Sulfur Trioxide is exothermic (releases energy). The enthalpy change (ΔH) is -198.2 kJ/mol.
What conditions are needed for Formation of Sulfur Trioxide?
This reaction requires a catalyst (Vanadium(V) oxide (V₂O₅)).