Interpreting Residual Entropies

Boltzmann Equation for Entropy:

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Sandeep Gurram 2E
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Interpreting Residual Entropies

Postby Sandeep Gurram 2E » Wed Jan 20, 2016 4:49 pm

When you are interpreting residual entropies for of a particular compound, how do you know how many orientations it can assume?

The example in the textbook showed that FClO3 had four orientations as it was tetrahedral. Is the molecular shape the only indicator of how many orientations a compound can assume? Or are there other factors?

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Re: Interpreting Residual Entropies

Postby Chem_Mod » Wed Jan 20, 2016 11:06 pm

Residual entropy is the remaining possible disorder when the substance is cooled to 0 Kelvin thus stopping all kinetic motion. So it is just the disorder resulting from possible variation in orientation. For example, the tetrahedral molecule FClO3 has four orientations while bromobenzene has six.

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