Choose the reaction with negative `DeltaS` valueA. `2NaHCO_(3(s))rarrNa_(2)CO_(3(s))+CO_(2(g))+H_(2)O_((g))`B. `Cl_(2(g))rarr2Cl_((g))`C. `2SO_(2(g))+O_(2(g))rarr2SO_(3(g))`D. `2KClO_(3(s))rarr2KCl_((s))+3O_(2(g))`

Choose the reaction with negative `DeltaS` valueA. `2NaHCO_(3(s))rarrN

1.	Choose the reaction with negative `DeltaS` valueA. `2NaHCO_(3(s))rarrNa_(2)CO_(3(s))+CO_(2(g))+H_(2)O_((g))`B. `Cl_(2(g))rarr2Cl_((g))`C. `2SO_(2(g))+O_(2(g))rarr2SO_(3(g))`D. `2KClO_(3(s))rarr2KCl_((s))+3O_(2(g))`
Answer» Correct Answer - C `DeltaS` has negative value if `Deltan_(g)=-ve` i.e. number of gaseous moles decreasing during a reaction. For (a), `Deltan_(g)=2-0=2` For (b), `Deltan_(g)=2-1=1` For (c ), `Deltan_(g)=2-3=-1` (`DeltaS` negative) For (d), `Deltan_(g)=3-0=3` For (e), `Deltan_(g)`=1-0=1

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