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13. Isentropic expansion. (a) Show that the entropy of an ideal gas can be expressed as a function only of the orbital occupa

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al N Z ZN = (2jh where is the number of parficks and Z = Jesep [-E (5)/2] is the single particle partition function. The vectus=Nlogz- logN! + NTP logz. The last term can be wriften NIE EC52 exp[-e()] = [ 4472 P (5) =[log n=1072, -loq f(€)]f(65) = n

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