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MHT CET202015 Oct 2020Evening ShiftChemistryElectrochemistryActual

What is the standard free energy change for the cell, having following cell reaction? 2 Ag _ ( aq .) ⁺+ Cd _ ( s ) 2 Ag _ ( s ) + Cd _ ( aq ) ²⁺, E ^ cell =1 20 ~V

Options

  1. A-231 6 ~kJ
  2. B-160 8 ~kJ
  3. C-115 8 ~kJ
  4. D-260 8 K j

Correct answer

A. -231 6 ~kJ

Step-by-step solution

2 Ag _ ( aq ) ⁺+ Cd _ ( s ) 2 Ag _ ( s ) + Cd _ ( aq ) ²⁺ n =2 G ⁰=- nFE _ cell ⁰=-2 96500 1.20=-231600 ~J =-231.6 ~kJ

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