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KVPY2011ChemistryElectrochemistry

The standard Gibbs free energy change ( G ^ . in kJ mol ⁻¹ ), in a Daniel cell ( E _ cell ^ =1.1 ~V . ), when 2 moles of Zn ( s ) is oxidized at 298 ~K , is closest to

Options

  1. A-212.3
  2. B-106.2
  3. C-424.6
  4. D-53.1

Correct answer

C. -424.6

Step-by-step solution

Zn + Cu ⁺² Zn ⁺²+ Cu 2 Zn +2 Cu ⁺² 2 Zn ⁺²+2 Cu For 2 moles of Zn , n =4 G ^ =- nFE _ Cell ^ =-4 96500 1.1=-424.6 ~kJ

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