Copper Patina Formation (Verdigris)
2Cu + O2 + H2O + CO2 → Cu2(OH)2CO3
نظرة عامة
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.
المشاركون
| الدور | المادة | المعامل | الحالة |
|---|---|---|---|
| متفاعل | Oxygen O | 1 | (g) |
| متفاعل | Water H₂O | 1 | (l) |
| متفاعل | Carbon Dioxide CO₂ | 1 | (g) |
| متفاعل | Copper Cu | 2 | (s) |
مثال من الحياة اليومية
The Statue of Liberty's green color is copper patina formed over decades of exposure to New York's atmosphere.
الأهمية الصناعية
Copper patination is deliberately accelerated in architecture for aesthetic purposes. Understanding copper corrosion is essential for building material selection.
الخصائص
- النوع
- Redox
- قابل للعكس
- لا
- الطاقة
- طارد للحرارة
- ΔH
- -720,0 kJ/mol
التفاعلات ذات الصلة
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)
Copper Oxidation by Nitric Acid
Hypochlorite Oxidation of Hydrogen Peroxide
Hydrogen Peroxide as Oxidizing Agent (Acidic)
Hydrogen Peroxide Disproportionation
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.