Copper Patina Formation (Verdigris)

2Cu + O2 + H2O + CO2 → Cu2(OH)2CO3

개요

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.

참여 물질

역할 물질 계수 상태
반응물 Oxygen O 1 (g)
반응물 Water H₂O 1 (l)
반응물 Carbon Dioxide CO₂ 1 (g)
반응물 Copper Cu 2 (s)

일상 속 예시

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

산업적 중요성

구리 녹 형성은 미학적 목적을 위해 건축에서 의도적으로 가속화됩니다. 구리 부식의 이해는 건축 자재 선택에 필수적입니다.

성질

유형
Redox
가역 반응
아니오
에너지
발열
ΔH
-720.0 kJ/mol

관련 반응

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.