Which of the following processes at 25 °C is expected to have the most positive value of ?

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

Problem

Which of the following processes at 25 °C is expected to have the most positive value of ΔS∘\Delta S^{\circ}? (a) 2 NO2(g)  →  N2O4(g)2\,\text{NO}_2(g) \;\rightarrow\; \text{N}_2\text{O}_4(g) (b) CO2(g)  →  CO2(s)\text{CO}_2(g) \;\rightarrow\; \text{CO}_2(s) (c) NH4NO3(s)  →  NH4+(aq)+NO3−(aq)\text{NH}_4\text{NO}_3(s) \;\rightarrow\; \text{NH}_4^{+}(aq) + \text{NO}_3^{-}(aq) (d) NaCl(s)  →  Na+(aq)+Cl−(aq)\text{NaCl}(s) \;\rightarrow\; \text{Na}^{+}(aq) + \text{Cl}^{-}(aq)

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