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
Electrorefining of Copper
Alkaline Battery Discharge
Anodizing of Aluminum
Chlor-Alkali Electrolysis
Nickel-Metal Hydride Battery
Daniell Cell (Zinc-Copper Galvanic Cell)
Electrolysis of Molten NaCl (Downs Process)
Lead-Acid Battery Discharge
Hall-Héroult Process (Aluminum Smelting)
Electrolysis of Water
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.