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When a system can only be prepared in one way

Posted: Tue Feb 12, 2019 11:18 pm
by Katherine Grillo 1B
What does it mean that a system can only be prepared in one way? And why does that mean S=0?

Re: When a system can only be prepared in one way

Posted: Wed Feb 13, 2019 10:52 am
by Chem_Mod
This is referring to when there is only one state/position available to the molecule(s). If there is only 1 position, then W (degeneracy)= 1number of molecules, and 1 raised to any power is still 1, then the ln(1)=0 so if S= kBln(W) then S=0. This tells us that the molecule or molecules do not possess any residual, or positional, entropy.

Re: When a system can only be prepared in one way

Posted: Sat Feb 16, 2019 9:19 pm
by Christopher Anisi 2K
That means that the system can only be oriented in one way meaning that it only has one energy state or degeneracy value of 1. And when utilizing S=KBlnW assuming there is only residual energy involved that would give you an entropy value of 0.