Which of the following reactions is most likely to have a positive standard entropy…

CHEMISTRY · Single correct · A Level · Chemistry · Thermodynamics · Thermodynamics

Problem

Which of the following reactions is most likely to have a positive standard entropy change, ΔS° > 0, at 298 K? (a) 2 SO2(g)+O2(g)  →  2 SO3(g)2\,\text{SO}_2(g) + O_2(g) \;\rightarrow\; 2\,\text{SO}_3(g) (b) N2(g)+3H2(g)  →  2NH3(g)N_2(g) + 3 H_2(g) \;\rightarrow\; 2 NH_3(g) (c) 2 SO3(g)  →  2 SO2(g)+O2(g)2\,\text{SO}_3(g) \;\rightarrow\; 2\,\text{SO}_2(g) + O_2(g) (d) 2NH3(g)+CO2(g)  →  NH2CONH2(s)+H2O(l)2 NH_3(g) + CO_2(g) \;\rightarrow\; NH_2CONH_2(s) + H_2O(l)

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