Thermal Decomposition of Sulfuric Acid

H2SO4 → H2O + SO3

概述

Concentrated sulfuric acid decomposes at high temperatures (above 340 C) into water vapor and sulfur trioxide gas. This is the reverse of the hydration reaction that produces sulfuric acid. The equilibrium shifts toward decomposition at high temperatures.

参与者

角色 物质 系数 状态
反应物 Sulfuric Acid H₂SO₄ 1 (l)
产物 Water H₂O 1 (g)
产物 Sulfur Trioxide SO₃ 1 (g)

日常示例

This decomposition is relevant to understanding why concentrated sulfuric acid fumes in hot weather and must be stored properly.

工业重要性

该平衡反应是接触法工业制硫酸工艺设计的理论基础，温度控制直接影响SO₃转化率和硫酸产率。

属性

类型
Decomposition
可逆
是
能量
吸热
ΔH
177.0 kJ/mol

相关反应

Decomposition of Ammonium Nitrate Decomposition of Calcium Hypochlorite Decomposition of Carbonic Acid Decomposition of Iron(II,III) Oxide (Direct Reduction) Decomposition of Nitrous Oxide (Laughing Gas) Decomposition of Barium Peroxide Decomposition of Sodium Bicarbonate Decomposition of Water (Electrolysis) Thermal Decomposition of Copper(II) Carbonate Cracking of Octane (Thermal Cracking)

Frequently Asked Questions

What is the equation for Thermal Decomposition of Sulfuric Acid?
The balanced equation is: H₂SO₄ → H₂O + SO₃.
What type of reaction is Thermal Decomposition of Sulfuric Acid?
Thermal Decomposition of Sulfuric Acid is a decomposition reaction. It is reversible under certain conditions.
Is Thermal Decomposition of Sulfuric Acid exothermic or endothermic?
Thermal Decomposition of Sulfuric Acid is endothermic (absorbs energy). The enthalpy change (ΔH) is 177.0 kJ/mol.