Solved: Predicting the Sign of SPredict whether S is

Chapter , Problem 2PE

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Problem 2PE

Predicting the Sign of S

Predict whether S is positive or negative for each process, assuming each occurs at constant temperature:

(a) H2O(l)H2O(g)

(b) Ag+(aq) + Cl-(aq)        AgCl(s)

(c) 4 Fe(s) + 3O2(g)2 Fe2O3(s)

(d) N2(g) + O2(g)2 NO(g)

Since the entropy of the universe increases for spontaneous processes, does it mean that the entropy of the universe decreases for nonspontaneous processes?

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