Zinc-Carbon Battery (Leclanché Cell)

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

Tổng quan

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.

Người tham gia

Vai trò	Chất	Hệ số	Trạng thái
Chất phản ứng	Zinc Zn	1	(s)
Chất phản ứng	Manganese Dioxide MnO₂	2	(s)
Chất phản ứng	Ammonium Chloride NH₄Cl	2	(s)
Sản phẩm	Water H₂O	1	(l)

Ví dụ thực tế

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

Tầm quan trọng công nghiệp

Zinc-carbon batteries still account for billions of units sold annually in developing countries due to their low cost.

Tính chất

Loại: Electrochemical
Thuận nghịch: Không
Năng lượng: Tỏa nhiệt
ΔH: -280,0 kJ/mol

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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.