Alkaline Battery Discharge

Zn + 2MnO2 + H2O → ZnO + 2MnOOH

Descripción general

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

Rol Sustancia Coeficiente Estado
Reactivo Zinc Zn 1 (s)
Reactivo Water H₂O 1 (l)
Reactivo Manganese Dioxide MnO₂ 2 (s)

Ejemplo cotidiano

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

Importancia industrial

Aproximadamente 10.000 millones de pilas alcalinas se venden globalmente cada año, representando el mayor segmento del mercado de pilas primarias de 50.000 millones de dólares.

Propiedades

Tipo
Electrochemical
Reversible
No
Energía
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.