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.