Formation of Sulfur Trioxide

2SO2 + O2 → 2SO3

Обзор

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.

Участники

Роль Вещество Коэффициент Состояние
Реагент Oxygen O 1 (g)
Реагент Sulfur Dioxide SO₂ 2 (g)
Продукт Sulfur Trioxide SO₃ 2 (g)

Пример из жизни

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

Промышленное значение

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.

Свойства

Тип
Synthesis
Обратимая
Да
Энергия
Экзотермическая
ΔH
-198,2 kJ/mol
Катализатор
Vanadium(V) oxide (V₂O₅)

Связанные реакции

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)).