Zinc-Carbon Battery (Leclanché Cell)

Zn + 2MnO2 + 2NH4Cl → ZnCl2 + Mn2O3 + 2NH3 + H2O

개요

The zinc-carbon cell uses a zinc casing as anode and a carbon rod surrounded by MnO₂ paste as cathode, with ammonium chloride paste electrolyte. Cell voltage is about 1.5 V. Invented by Georges Leclanché in 1866, it was the dominant primary battery for over a century before being largely replaced by alkaline cells.

참여 물질

역할 물질 계수 상태
반응물 Zinc Zn 1 (s)
반응물 Manganese Dioxide MnO₂ 2 (s)
반응물 Ammonium Chloride NH₄Cl 2 (s)
생성물 Water H₂O 1 (l)

일상 속 예시

The cheapest AA and AAA batteries at the store are zinc-carbon cells, suitable for low-drain devices like remote controls and clocks.

산업적 중요성

아연-탄소 전지는 저렴한 가격으로 인해 개발도상국에서 여전히 연간 수십억 개가 판매되고 있습니다.

성질

유형
Electrochemical
가역 반응
아니오
에너지
발열
ΔH
-280.0 kJ/mol

관련 반응

Electrolysis of Water Electrolytic Production of Chlorate Electrorefining of Copper Alkaline Battery Discharge Anodizing of Aluminum Cathodic Protection (Zinc Sacrificial Anode) Chlor-Alkali Electrolysis Chrome Electroplating Nickel-Metal Hydride Battery Electrochemical CO₂ Reduction to CO

Frequently Asked Questions

What is the equation for Zinc-Carbon Battery (Leclanché Cell)?
The balanced equation is: Zn + 2MnO₂ + 2NH₄Cl → ZnCl₂ + Mn₂O₃ + 2NH₃ + H₂O.
What type of reaction is Zinc-Carbon Battery (Leclanché Cell)?
Zinc-Carbon Battery (Leclanché Cell) is a electrochemical reaction.
Is Zinc-Carbon Battery (Leclanché Cell) exothermic or endothermic?
Zinc-Carbon Battery (Leclanché Cell) is exothermic (releases energy). The enthalpy change (ΔH) is -280.0 kJ/mol.