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A galvanic cell differs from an electrolytic cell in that a galvanic cell

  • A.produces electrical energy from a spontaneous reaction
  • B.consumes electrical energy to drive a reaction
  • C.requires no electrolyte between its electrodes
  • D.operates only when an external voltage is applied to it

Answer: A

The chemical reaction in a galvanic cell is thermodynamically downhill and its free energy appears as electrical work. An electrolytic cell runs the reverse reaction and must be pushed by an external supply larger than the cell's own opposing EMF.

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