Daniell Cell (Zinc-Copper Galvanic Cell)

Zn + Cu2+ → Zn2+ + Cu

Tổng quan

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.

Người tham gia

Vai trò Chất Hệ số Trạng thái
Chất phản ứng Zinc Zn 1 (s)
Sản phẩm Copper Cu 1 (s)

Ví dụ thực tế

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

Tầm quan trọng công nghiệp

While superseded by modern batteries, the Daniell cell remains the textbook example for teaching electrochemistry and electrode potentials.

Tính chất

Loại
Electrochemical
Thuận nghịch
Có
Năng lượng
Tỏa nhiệt
ΔH
-210,0 kJ/mol

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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.