Copper Patina Formation (Verdigris)

2Cu + O2 + H2O + CO2 → Cu2(OH)2CO3

概述

Copper slowly oxidizes in moist air containing CO₂ to form basic copper carbonate, the green patina known as verdigris. Copper is oxidized from Cu⁰ to Cu²⁺. Unlike iron rust, the copper patina forms a protective layer that prevents further corrosion, which is why copper roofs last centuries.

参与者

角色 物质 系数 状态
反应物 Oxygen O 1 (g)
反应物 Water H₂O 1 (l)
反应物 Carbon Dioxide CO₂ 1 (g)
反应物 Copper Cu 2 (s)

日常示例

The Statue of Liberty's green color is copper patina formed over decades of exposure to New York's atmosphere.

工业重要性

建筑上故意加速铜的锈化过程以获得美观效果。理解铜的腐蚀对建筑材料的选择至关重要。

属性

类型
Redox
可逆
否
能量
放热
ΔH
-720.0 kJ/mol

相关反应

Iron(II) to Iron(III) Oxidation by Oxygen Bleaching with Sodium Hypochlorite Copper Reduction of Silver Ion Aqua Regia Dissolving Gold Cerium(IV) Reduction by Iron(II) Chlorine Oxidation of Bromide Copper Oxidation by Nitric Acid Hypochlorite Oxidation of Hydrogen Peroxide Hydrogen Peroxide as Oxidizing Agent (Acidic) Displacement of Hydrogen from Acid by Magnesium

Frequently Asked Questions

What is the equation for Copper Patina Formation (Verdigris)?
The balanced equation is: 2Cu + O₂ + H₂O + CO₂ → Cu₂(OH)₂CO₃.
What type of reaction is Copper Patina Formation (Verdigris)?
Copper Patina Formation (Verdigris) is a redox reaction.
Is Copper Patina Formation (Verdigris) exothermic or endothermic?
Copper Patina Formation (Verdigris) is exothermic (releases energy). The enthalpy change (ΔH) is -720.0 kJ/mol.