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entropy in reversible/irreversible processes

Posted: Tue Mar 13, 2018 7:38 pm
by Simrina Desar Dis 1H
If entropy is a state function and therefore the pathway to get to the end state does not matter, why are there different equations for entropy based on whether the pathway is reversible vs irreversible?

Re: entropy in reversible/irreversible processes

Posted: Tue Mar 13, 2018 8:00 pm
by Aya Shokair- Dis 2H
When calculation the change in entropy we use the basic equation of:
ΔS= q(rev)/T

I remember reading in the book that we assume all the work done is reversible when we use work to calculate ΔS. (ΔU=0, so q=-w)