# Entropy -- prove it increases for irreversible process

hi all,

this is Entropy Rate Balance for Control Volumes.

in the case of throttling process,

.

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.

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Chestermiller
Mentor
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.