show the mathematical relationship for an entropy change for an ideal gas.
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Explanation:
It is known [1] that the entropy change for a monatomic ideal gas is given by DS = nRln(Tf /Ti)-nRln(Pf/Pi), where R is the molar gas constant and n is the amount of substance. This formula, which was obtained by recurring to a reversible process between the states (Ti ,Pi) and (Tf,Pf), gives DS = -8.000 J K-1.
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