Daniell Cell (Zinc-Copper Galvanic Cell)

Zn + Cu²⁺ → Zn²⁺ + Cu

نظرة عامة

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.

المشاركون

الدور	المادة	المعامل	الحالة
متفاعل	Zinc Zn	1	(s)
منتج	Copper Cu	1	(s)

مثال من الحياة اليومية

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

الأهمية الصناعية

While superseded by modern batteries, the Daniell cell remains the textbook example for teaching electrochemistry and electrode potentials.

الخصائص

النوع: Electrochemical
قابل للعكس: نعم
الطاقة: طارد للحرارة
ΔH: -210,0 kJ/mol

التفاعلات ذات الصلة

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.