Alkaline Battery Discharge
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Zn + 2MnO2 + H2O → ZnO + 2MnOOH
概述
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.
参与者
| 角色 | 物质 | 系数 | 状态 |
|---|---|---|---|
| 反应物 | Zinc Zn | 1 | (s) |
| 反应物 | Water H₂O | 1 | (l) |
| 反应物 | Manganese Dioxide MnO₂ | 2 | (s) |
日常示例
Duracell and Energizer AA batteries are alkaline cells — the most common battery type in the developed world.
工业重要性
全球每年约销售100亿节碱性电池,占500亿美元一次电池市场的最大份额。
属性
- 可逆
- 否
- 能量
- 放热
- ΔH
- -315.0 kJ/mol
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.