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Entropy, Free Energy, and Equilibrium

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Entropy, Free Energy, and Equilibrium:
Under what conditions does a substance have a standard entropy of zero? Can a substance ever have a negative standard entropy?

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The expert determines what conditions a substance has for a standard entropy of zero. Whether a substance has a negative standard entropy is given.

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At zero Kelvin or -273 degrees centigrade temperature a substance has a standard ...

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