Formation of Sulfur Dioxide

S + O2 → SO2

Overview

Sulfur burns in oxygen with a characteristic blue flame to produce sulfur dioxide, a pungent-smelling gas. This reaction is the first step in the industrial production of sulfuric acid. Sulfur dioxide is also a significant atmospheric pollutant.

Participants

Role Substance Coefficient State
Reactant Sulfur S 1 (s)
Reactant Oxygen O 1 (g)
Product Sulfur Dioxide SO₂ 1 (g)

Everyday Example

The smell of a struck match comes partly from sulfur dioxide produced as the match head burns.

Industrial Importance

This reaction is the first step of the Contact Process for sulfuric acid manufacturing. It is also relevant to understanding volcanic emissions and industrial pollution.

Properties

Type
Synthesis
Reversible
No
Energy
Exothermic
ΔH
-296.8 kJ/mol

Related Reactions

Fischer-Tropsch Synthesis (General) Formation of Aluminum Oxide Formation of Ammonia (Haber Process) Formation of Barium Oxide Formation of Barium Sulfate Formation of Beryllium Oxide Formation of Cadmium Oxide Formation of Calcium Carbonate from Oxides Formation of Calcium Hydroxide Formation of Calcium Oxide (Quicklime)

Frequently Asked Questions

What is the equation for Formation of Sulfur Dioxide?
The balanced equation is: S + O₂ → SO₂.
What type of reaction is Formation of Sulfur Dioxide?
Formation of Sulfur Dioxide is a synthesis reaction.
Is Formation of Sulfur Dioxide exothermic or endothermic?
Formation of Sulfur Dioxide is exothermic (releases energy). The enthalpy change (ΔH) is -296.8 kJ/mol.