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Advanced PhysicsQ&A LibraryProblem 4:According to the Sackur-Tetrode equation, the entropy of a monatomic ideal gas can becomenegative when its temperature (and hence its energy) is sufficiently low. This is absurd, so theequation breaks down at low T. Pretend that Helium remains a gas at low T, and we keep N /Vfixed. Below which T would the Sackur-Tetrode equation predict that S is negative?Question

Asked Feb 16, 2020

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Sackur-Tetrode equation is given by,

From the above expression,

It can be observed that when the internal energy *U* is low enough such that the log term goes below – 5/2, the entropy *S* becomes...

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