Monday, May 24, 2010

What is the standard free energy change for this reaction?

The nickel-cadmium battery cell has a standard potential of +1.20 v. The cell reaction is 2 NiO(OH)(s) + Cd(s) + 2H2O(l) ===%26gt; 2 Ni(OH)2(s) + Cd(OH)2(s). What is the standard free energy change for this reaction?





A. -38.7 kJ


B. -116 kJ


C. -232 kJ


D. -463 kJ

What is the standard free energy change for this reaction?
∆G = -nFE° = -2*96485*1.20 = -232 (kJ)


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