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Cell potential and free energy

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A galvanic cell is constructed based on the reaction represented above. The standard potential for the cell at 298 K is 2.37 V.
Calculate the value of ΔG°rxn, in kJ/molrxn, for the cell reaction at 298 K.
Write your answer using three significant figures.
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3/5
  • a simplified improper fraction, like 7/4
  • a mixed number, like 1 3/4
  • an exact decimal, like 0.75
  • a multiple of pi, like 12 pi or 2/3 pi