Which of the following processes at 298 K is expected to have a positive standard…

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

Problem

Which of the following processes at 298 K is expected to have a positive standard entropy change, ΔS∘\Delta S^{\circ}? (a) H2O(l)→H2O(s)\text{H}_2\text{O}(l)\rightarrow \text{H}_2\text{O}(s) (b) N2(g)+3  H2(g)→2  NH3(g)\text{N}_2(g)+3\;\text{H}_2(g)\rightarrow 2\;\text{NH}_3(g) (c) CaCO3(s)→CaO(s)+CO2(g)\text{CaCO}_3(s)\rightarrow \text{CaO}(s)+\text{CO}_2(g) (d) CaO(s)+CO2(g)→CaCO3(s)\text{CaO}(s)+\text{CO}_2(g)\rightarrow \text{CaCO}_3(s)

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