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The entropy change of a system undergoing a reversible process is

  • A.the enthalpy change divided by the absolute temperature
  • B.the heat transferred divided by the temperature
  • C.the work done divided by the absolute temperature reached
  • D.always exactly zero for any reversible process

Answer: B

This is the defining relation, and integrating it along a reversible path gives the entropy difference between two states. Because entropy is a property, that difference then holds for any path between the same states.

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