Alkaline Battery Discharge

Zn + 2MnO2 + H2O → ZnO + 2MnOOH

Visão geral

Alkaline batteries use zinc powder anode and MnO₂ cathode in potassium hydroxide electrolyte, producing 1.5 V. They offer 4–9 times the capacity of zinc-carbon cells for high-drain devices. The alkaline electrolyte provides lower internal resistance and better performance at high current.

Participantes

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

Exemplo do cotidiano

Duracell and Energizer AA batteries are alkaline cells — the most common battery type in the developed world.

Importância industrial

Cerca de 10 mil milhões de pilhas alcalinas são vendidas globalmente todos os anos, representando o maior segmento do mercado de pilhas primárias de 50 mil milhões de dólares.

Propriedades

Tipo
Electrochemical
Reversível
Não
Energia
Exotérmico
ΔH
-315,0 kJ/mol

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Frequently Asked Questions

What is the equation for Alkaline Battery Discharge?
The balanced equation is: Zn + 2MnO₂ + H₂O → ZnO + 2MnOOH.
What type of reaction is Alkaline Battery Discharge?
Alkaline Battery Discharge is a electrochemical reaction.
Is Alkaline Battery Discharge exothermic or endothermic?
Alkaline Battery Discharge is exothermic (releases energy). The enthalpy change (ΔH) is -315.0 kJ/mol.