Daniell Cell (Zinc-Copper Galvanic Cell)

Zn + Cu2+ → Zn2+ + Cu

개요

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.

참여 물질

역할 물질 계수 상태
반응물 Zinc Zn 1 (s)
생성물 Copper Cu 1 (s)

일상 속 예시

The Daniell cell powered early telegraph networks across America and Europe, enabling rapid long-distance communication.

산업적 중요성

현대 배터리로 대체되었지만, 다니엘 전지는 전기화학과 전극 전위를 가르치는 교과서적인 예시로 남아 있습니다.

성질

유형
Electrochemical
가역 반응
예
에너지
발열
ΔH
-210.0 kJ/mol

관련 반응

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

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.