Copper Patina Formation (Verdigris)

2Cu + O2 + H2O + CO2 → Cu2(OH)2CO3

概要

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.

参加者

役割 物質 係数 状態
反応物 Oxygen O 1 (g)
反応物 Water H₂O 1 (l)
反応物 Carbon Dioxide CO₂ 1 (g)
反応物 Copper Cu 2 (s)

日常の例

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

産業上の重要性

銅の緑青化は建築において美的目的で意図的に加速されます。銅の腐食の理解は建築材料の選択に不可欠です。

特性

タイプ
Redox
可逆的
いいえ
エネルギー
発熱性
ΔH
-720.0 kJ/mol

関連する反応

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.