Predict whether the entropy change is positive or negative for each of these reactions:
(a) Zn(s) + 2HC1 (aq) ⇄ ZnCl2(aq) + H2(g)
(b) O(g) + O(g) ⇄ O2(g)
(c) NH4NO3(s) ⇄ N2O(g) + 2H2O(g)
(d) 2H2O2(l) ⇄ 2H2O(l) + 02(g)
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