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OpenStudy (anonymous):

Which of the following reactions results in a decrease in entropy? CaCO3 (s) CaO (s) + CO2 (g) N2O4 (g) 2NO2 (g) CaO (s) + SO3 (g) CaSO4 (s) 2NH3 (g) N2 (g) + 3H2 (g) @nechirwan

OpenStudy (anonymous):

CaCO3 (s) CaO (s) + CO2 (g) N2O4 (g) 2NO2 (g) CaO (s) + SO3 (g) CaSO4 (s) 2NH3 (g) N2 (g) + 3H2 (g)

OpenStudy (nechirwan):

CaO + SO3 yields CaSO4. This reaction results in a decrease in entropy because you get solid calcium sulphate, which is more ordered as compared to other gaseous products.

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