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A body of constant heat capacity C_p and at a temperature T_i is put in contact with a reservoir at a higher temperature T_f.

The pressure remains constant while the body comes to equilibrium with the reservoir. Show that the entropy change of the universe is equal to

ΔS = C_p[x - ln(1+x)];

where x = -(T_f - T_i)/T_f. Prove that the entropy change is positive.

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Category:- Chemistry
Reference No.:- M92166462

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