Alkaline Battery Discharge

Zn + 2MnO2 + H2O → ZnO + 2MnOOH

Übersicht

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.

Teilnehmer

Rolle Substanz Koeffizient Zustand
Reaktant Zinc Zn 1 (s)
Reaktant Water H₂O 1 (l)
Reaktant Manganese Dioxide MnO₂ 2 (s)

Alltägliches Beispiel

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

Industrielle Bedeutung

About 10 billion alkaline batteries are sold globally each year, representing the largest segment of the $50 billion primary battery market.

Eigenschaften

Typ
Electrochemical
Reversibel
Nein
Energie
Exotherm
ΔH
-315,0 kJ/mol

Verwandte Reaktionen

Electrolysis of Water Electrolytic Production of Chlorate Electrorefining of Copper Anodizing of Aluminum Cathodic Protection (Zinc Sacrificial Anode) Chlor-Alkali Electrolysis Chrome Electroplating Nickel-Metal Hydride Battery Sodium-Sulfur Battery Electrochemical CO₂ Reduction to CO

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.