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ChemistryElectrochemistryGalvanic cells/Nernst Equation/Concentration CellsMedium2 min

ChemistryMediumsingle choice

For the cell reaction, $Cu^{2 +} (C_{1}, aq) + Zn (s) = Zn^{2 +} (C_{2}, aq) + Cu (s)$ of an electrochemical cell, the change in free energy, $Δ G$ , at a given temperature is a function of

Options:

Answer:

Solution:

The change in free energy, $Δ G$ , for an electrochemical cell is related to the reaction quotient $Q$ by the equation $Δ G = - n FE + RT ln Q$ . For the given reaction, $Q = \frac{[ Z n ^{2 +} ]}{[ C u ^{2 +} ]} = \frac{C _{2}}{C _{1}}$ . Therefore, $Δ G$ is a function of $ln (\frac{C _{2}}{C _{1}})$ . The correct option is B.

Stream:JEESubject:ChemistryTopic:ElectrochemistrySubtopic:Galvanic cells/Nernst Equation/Concentration Cells

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