Entropy for Changes in Pressure

Volume:
Temperature:

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reginacabanban1I
Posts: 14
Joined: Fri Sep 25, 2015 3:00 am

Entropy for Changes in Pressure

Postby reginacabanban1I » Sat Mar 12, 2016 1:05 pm

Why is it for dS in calculations for changes in temperature and volume the final state is always in the numerator of the natural log function {ie. ln(V2/V1) or ln (T2/T1)}
but for pressure the equation is dS = nRln(P1/P2)?

104422816
Posts: 17
Joined: Fri Sep 25, 2015 3:00 am

Re: Entropy for Changes in Pressure

Postby 104422816 » Sat Mar 12, 2016 1:22 pm

Because of the way the log function ln(t2)-ln(t1) = ln(t2/t1) which is final-initial and since this is thermodynamics, that is what you would be looking for!


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