Standard Molar Entropies
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Standard Molar Entropies
When comparing substances, how do you know which has a higher standard molar entropy?
Re: Standard Molar Entropies
It has a higher standard molar entropy if it is more complex (meaning it has more atoms or subatomic particles like electrons). Gas has highest entropy, then liquid, and solids have the lowest.
Re: Standard Molar Entropies
There was also a section on page 306 in the textbook that mentioned the effect mass has on standard molar entropies. Specifically it says that "...the greater the mass of the molecules, the closer together are the energy levels." These energy levels are more "thermally accessible" which I believe means that it is easier to create thermal disorder with heavier molecules than with lighter molecules. This causes substances with heavier molecules to have higher standard entropies than those with lighter molecules. Hope this didn't add any confusion, but if you want to know more, you can check out p. 306 in the text book.
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