Consider an electrochemical system that can be operated either as a galvanic cell or

CHEMISTRY · Single correct · AP · Chemistry · Thermodynamics and Electrochemistry · Thermodynamics and Electrochemistry

Problem

Consider an electrochemical system that can be operated either as a galvanic cell or, when attached to an external power source, as an electrolytic cell. Which of the following sets of thermodynamic signs correctly pairs the cell type with the associated values of ΔG and E_cell at the moment current begins to flow? (a) Galvanic: ΔG>0\Delta G>0 and Ecell<0E_{\text{cell}}<0 ; Electrolytic: ΔG<0\Delta G<0 and Ecell>0E_{\text{cell}}>0 (b) Galvanic: ΔG<0\Delta G<0 and Ecell<0E_{\text{cell}}<0 ; Electrolytic: ΔG>0\Delta G>0 and Ecell>0E_{\text{cell}}>0 (c) Galvanic: ΔG<0\Delta G<0 and Ecell>0E_{\text{cell}}>0 ; Electrolytic: ΔG>0\Delta G>0 and Ecell<0E_{\text{cell}}<0 (d) Galvanic: ΔG<0\Delta G<0 and Ecell>0E_{\text{cell}}>0 ; Electrolytic: ΔG>0\Delta G>0 and Ecell>0E_{\text{cell}}>0

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