Daniell Cell (Zinc-Copper Galvanic Cell)
Zn + Cu2+ → Zn2+ + Cu
概要
The Daniell cell consists of a zinc anode in ZnSO₄ solution and a copper cathode in CuSO₄ solution, connected by a salt bridge. Zinc is oxidized (E° = -0.76 V) and copper ions are reduced (E° = +0.34 V), giving a cell potential of 1.10 V. Invented by John Frederic Daniell in 1836, it was the first reliable source of electricity.
参加者
日常の例
The Daniell cell powered early telegraph networks across America and Europe, enabling rapid long-distance communication.
産業上の重要性
現代の電池に取って代わられましたが、ダニエル電池は電気化学と電極電位を教える教科書的な例として残っています。
特性
- タイプ
- Electrochemical
- 可逆的
- はい
- エネルギー
- 発熱性
- ΔH
- -210.0 kJ/mol
Frequently Asked Questions
What is the equation for Daniell Cell (Zinc-Copper Galvanic Cell)?
The balanced equation is: Zn + Cu²⁺ → Zn²⁺ + Cu.
What type of reaction is Daniell Cell (Zinc-Copper Galvanic Cell)?
Daniell Cell (Zinc-Copper Galvanic Cell) is a electrochemical reaction. It is reversible under certain conditions.
Is Daniell Cell (Zinc-Copper Galvanic Cell) exothermic or endothermic?
Daniell Cell (Zinc-Copper Galvanic Cell) is exothermic (releases energy). The enthalpy change (ΔH) is -210.0 kJ/mol.