For the cell Zn   s ZnSO 4   aq CuSO 4   aq Cu   s , when the concentration of Zn 2 + is…

For the cell Zn sZnSO4 aqCuSO4 aqCu s, when the concentration of Zn2+ is 10 times the concentration of Cu2+, the expression for ΔG in J mol-1 is

[F=Faraday's constant, R=universal gas constant, T=temperature, Eocell=1.1 V]

  1. 2.303×RT+1.1F
  2. 2.303×RT-2.2F
  3. 1.1F
  4. -2.2F

Solution

ΔG=ΔG°+2.303×RT×log Q,

ΔG=-nFE°+2.303×RT×log Q.

Given, E°=1.1 V and n=2,

ΔG=-2×1.1×F+2.303×RT×logZn+2Cu+2,

ΔG=-2.2F+2.303×RT.

Asked in: JEE Advanced 2017 (Paper 2)

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