Entropy -- prove it increases for irreversible process

  • #1
hi all,

upload_2015-5-20_2-14-30.png

this is Entropy Rate Balance for Control Volumes.

in the case of throttling process,


upload_2015-5-20_2-17-43.png
.


throttling process is irreversible process, so (S2- S1) must be greater than zero.

what i want to know is to prove that (s2-s1) is greater than zero.

Thank you in advance.
 

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  • #2
21,154
4,671
hi all,

View attachment 83647
this is Entropy Rate Balance for Control Volumes.

in the case of throttling process,


View attachment 83652.


throttling process is irreversible process, so (S2- S1) must be greater than zero.

what i want to know is to prove that (s2-s1) is greater than zero.

Thank you in advance.
I thought we had already answered this question in the following thread: https://www.physicsforums.com/threads/throttling-process.814170/#post-5112310. Were you dissatisfied with the explanation given in that thread? If so, what was it that you disagree with?

Chet
 

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