Daniell Cell (Zinc-Copper Galvanic Cell)

Zn + Cu2+ → Zn2+ + Cu

Visão geral

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.

Participantes

Papel Substância Coeficiente Estado
Reagente Zinc Zn 1 (s)
Produto Copper Cu 1 (s)

Exemplo do cotidiano

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

Importância industrial

Embora ultrapassada pelas pilhas modernas, a pilha de Daniell continua a ser o exemplo dos manuais escolares para ensinar eletroquímica e potenciais de elétrodo.

Propriedades

Tipo
Electrochemical
Reversível
Sim
Energia
Exotérmico
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.