Machine-translated by Google. Questions are authored in English.
Top

Discussion

The entropy balance for an open system at steady state states that

  • A.the entropy generation is equal to the work done by the device
  • B.entropy out less entropy in equals heat entropy plus generation
  • C.the entropy entering equals the entropy leaving in all cases
  • D.the entropy of the control volume rises steadily with time

Answer: B

Streams carry entropy in and out, heat transfer carries entropy across the boundary, and irreversibility adds the generation term. At steady state the inventory inside does not change, which is what allows the balance to be written this way.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.