Formation of Sulfur Trioxide

2SO2 + O2 → 2SO3

概要

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.

参加者

役割 物質 係数 状態
反応物 Oxygen O 1 (g)
反応物 Sulfur Dioxide SO₂ 2 (g)
生成物 Sulfur Trioxide SO₃ 2 (g)

日常の例

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

産業上の重要性

接触法は世界最多製造化学品である硫酸製造の主要工業手法である。V₂O₅触媒は高いSO₂転化率を達成し、二重接触法では99.7%以上の変換率を実現する。

特性

タイプ
Synthesis
可逆的
はい
エネルギー
発熱性
ΔH
-198.2 kJ/mol
触媒
Vanadium(V) oxide (V₂O₅)

関連する反応

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)).