Thermal Decomposition of Sulfuric Acid

H2SO4 → H2O + SO3

概要

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.

参加者

役割 物質 係数 状態
反応物 Sulfuric Acid H₂SO₄ 1 (l)
生成物 Water H₂O 1 (g)
生成物 Sulfur Trioxide SO₃ 1 (g)

日常の例

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

産業上の重要性

この平衡は硫酸の濃縮プロセスや、硫酸製造の鉛室法・接触法において重要である。

特性

タイプ
Decomposition
可逆的
はい
エネルギー
吸熱性
ΔH
177.0 kJ/mol

関連する反応

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.