12. Which of the following terms can be used to describe an electrochemical cell in which a spontaneous chemical reaction generates an electric current? I. an electrolytic cell II. a galvanic cell III.  a voltaic cell 13.Which cell involves a non-spontaneous redox reaction? 14. The nickel-cadmium battery cell has a standard potential of +1.20 V. The cell reaction is 2 NiO(OH)(s) + Cd(s) + 2 H2O(l) → 2 Ni(OH)2(s) + Cd(OH)2(s). Half reactions:                    Cd(s) ------>  Cd2+ (aq)  +  2 e- 2Ni3+ (aq)  +  2e- ----->  2Ni2+ (aq)   What is the standard free energy change for this reaction? [ΔGo = -nFEocell]

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