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Discussion

Entropy increase dS of the system can be expressed as

  • A.dS=dS(due to external heat interaction)-dS(due to internal irreversibility)
  • B.dS=dS(due to external heat interaction)+dS(due to internal irreversibility)
  • C.dS=-dS(due to external heat interaction)-dS(due to internal irreversibility)
  • D.dS=-dS(due to external heat interaction)+dS(due to internal irreversibility)

Answer: B

Total entropy increase of the system is the sum of these two entropies.

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