AP Chemistry Quiz
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THERMODYNAMICS AND ELECTROCHEMISTRY
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A student sets up two half-cells, Zn(s)∣Zn2+(aq)\text{Zn}(s)|\text{Zn}^{2+}(aq) and Cu2+(aq)∣Cu(s)\text{Cu}^{2+}(aq)|\text{Cu}(s), connected by a salt bridge and a wire that passes through a light bulb. When the circuit is completed, the bulb lights without any battery attached, and the zinc electrode gradually becomes thinner. Based on these observations, which statement best classifies the process and its defining feature?
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