Why is Cpln(T2/T1) Zero for Isothermal Entropy Change?

freshbox
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Can someone explain to me why Cpln(T2/T1) = 0?

Thank you.
 

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freshbox said:
Can someone explain to me why Cpln(T2/T1) = 0?

Thank you.

Expanding isothermally means that T2 = T1.
 
Ok sorry... I forget about this concept. sorry thanks for your explanation Chestermiller :)
 
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