Zinc-Carbon Battery (Leclanché Cell)

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

概要

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.

参加者

役割 物質 係数 状態
反応物 Zinc Zn 1 (s)
反応物 Manganese Dioxide MnO₂ 2 (s)
反応物 Ammonium Chloride NH₄Cl 2 (s)
生成物 Water H₂O 1 (l)

日常の例

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

産業上の重要性

亜鉛炭素電池は低コストのため、発展途上国を中心に年間数十億個が販売されている。

特性

タイプ
Electrochemical
可逆的
いいえ
エネルギー
発熱性
ΔH
-280.0 kJ/mol

関連する反応

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.