Formation of Sulfur Trioxide

2SO2 + O2 → 2SO3

Übersicht

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.

Teilnehmer

Rolle Substanz Koeffizient Zustand
Reaktant Oxygen O 1 (g)
Reaktant Sulfur Dioxide SO₂ 2 (g)
Produkt Sulfur Trioxide SO₃ 2 (g)

Alltägliches Beispiel

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

Industrielle Bedeutung

The Contact Process is the primary industrial method for producing sulfuric acid, the world's most produced chemical. Over 260 million tonnes of sulfuric acid are made annually using this reaction.

Eigenschaften

Typ
Synthesis
Reversibel
Ja
Energie
Exotherm
ΔH
-198,2 kJ/mol
Katalysator
Vanadium(V) oxide (V₂O₅)

Verwandte Reaktionen

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)).