Thermal Decomposition of Sulfuric Acid

H2SO4 → H2O + SO3

개요

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.

참여 물질

역할 물질 계수 상태
반응물 Sulfuric Acid H₂SO₄ 1 (l)
생성물 Water H₂O 1 (g)
생성물 Sulfur Trioxide SO₃ 1 (g)

일상 속 예시

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

산업적 중요성

이 평형은 황산 농축 공정과 황산 제조의 연실법 및 접촉법에서 중요합니다.

성질

유형
Decomposition
가역 반응
예
에너지
흡열
ΔH
177.0 kJ/mol

관련 반응

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.