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An ideal gas containing 10^23 molecules is initially confined to one side of a room, then...

An ideal gas containing 10^23 molecules is initially confined to one side of a room, then expands to fill the whole room. Its internal energy does not change.

a. Calculate the multiplicity of the system before it expands. b. Calculate the multiplicity of the system after it expands. c. Calculate its entropy change. Use Stirling’s approximation to calculate multiplicity.

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