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Electrochemistry question

2010 · Q105
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Electrochemistry question

2010 · Q105

NEETChemistryElectrochemistryMCQ+4 / −1
For the reduction of silver ions with copper metal, the standard cell potential was found to be + 0.46 V at 25oC. The value of standard Gibb's energy, Δ\DeltaΔGo will be
(F = 96500 C mol−-−1)
  1. A
    −-− 89.0 kJ
  2. B
    −-− 89.0 J
  3. C
    −-− 44.5 kJ
  4. D
    −-− 98.0 kJ
View written solutionFree

Correct answer: A

The cell reaction

Cu + 2Ag+ →\to→ Cu2+ + 2Ag

We know, Δ\Delta ΔG° = – nFE°cell

= – 2 × 96500 × 0.46 = – 88780 J

= – 88.780 kJ = – 89 kJ

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