Zinc-Carbon Battery (Leclanché Cell)

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

Visão geral

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.

Participantes

Papel	Substância	Coeficiente	Estado
Reagente	Zinc Zn	1	(s)
Reagente	Manganese Dioxide MnO₂	2	(s)
Reagente	Ammonium Chloride NH₄Cl	2	(s)
Produto	Water H₂O	1	(l)

Exemplo do cotidiano

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

Importância industrial

As pilhas de zinco-carbono ainda representam milhares de milhões de unidades vendidas anualmente em países em desenvolvimento devido ao seu baixo custo.

Propriedades

Tipo: Electrochemical
Reversível: Não
Energia: Exotérmico
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.