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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

  1. Aln ( C 2 )
  2. Bln ( C 2 / C 1 )
  3. Cln ( C 1 )
  4. Dln ( C 1 + C 2 )

Correct answer

B. ln ( C 2 / C 1 )

Step-by-step solution

We know ΔG o = − nFE ° Again according to Nernst equation, E ° = 0.059 n l o g [ Z n 2 + ] [ C u 2 + ] , at 25°C So ΔG o (free energy change) in an electrochemical cell at a given temperature is a function of l n [ Z n 2 + ] [ C u 2 + ] = l n C 2 C 1

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