CHEMISTRY · Single correct · AP · Chemistry · Thermodynamics and Electrochemistry · Thermodynamics and Electrochemistry
Problem
Molten NaCl is placed in a crucible, and electrodes connected to a direct-current power supply are inserted. When the circuit is completed, sodium metal forms at one electrode and chlorine gas is released at the other. Which statement correctly classifies this setup?
(a) It is a galvanic cell because Ecell∘>0 for the overall reaction.
(b) It is an electrolytic cell because electrical energy is used to drive a non-spontaneous chemical change.
(c) It is an electrolytic cell because ΔG∘<0 for the overall reaction.
(d) It is a galvanic cell because the sodium electrode is the anode where reduction occurs.