Formation of Sulfur Trioxide

2SO2 + O2 → 2SO3

概述

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.

参与者

角色 物质 系数 状态
反应物 Oxygen O 1 (g)
反应物 Sulfur Dioxide SO₂ 2 (g)
产物 Sulfur Trioxide SO₃ 2 (g)

日常示例

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

工业重要性

三氧化硫是接触法制硫酸的中间体，全球硫酸年产量约2.5亿吨，广泛用于磷肥（过磷酸钙）、钛白粉、钢铁酸洗和化工合成。

属性

类型
Synthesis
可逆
是
能量
放热
ΔH
-198.2 kJ/mol
催化剂
Vanadium(V) oxide (V₂O₅)

相关反应

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)).