Thermal Decomposition of Sulfuric Acid

H₂SO₄ → H₂O + SO₃

Tổng quan

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.

Người tham gia

Vai trò	Chất	Hệ số	Trạng thái
Chất phản ứng	Sulfuric Acid H₂SO₄	1	(l)
Sản phẩm	Water H₂O	1	(g)
Sản phẩm	Sulfur Trioxide SO₃	1	(g)

Ví dụ thực tế

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

Tầm quan trọng công nghiệp

This equilibrium is important in sulfuric acid concentration processes and in the lead-chamber and contact processes for sulfuric acid manufacturing.

Tính chất

Loại: Decomposition
Thuận nghịch: Có
Năng lượng: Thu nhiệt
ΔH: 177,0 kJ/mol

Phản ứng liên quan

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.