Which of the following has `DeltaS^(@)` greater than zero

Options

A. `CaO_((s)) +CO_(2(g)) hArr CaCO_(3(s))`
B. `NaCl_((aq)) hArr Na_((aq))^(+) + Cl_((aq))^(-)`
C. `NaNO_(3(s)) hArr Na_((aq))^(+) + NO_(3(aq))^(-)`
D. `N_(2(g))+3H_(2(g)) hArr 2NH_(3(g))`

Answer

C

Explanation

`NaNO_(3(s))`, [orderly state]
`[Na_((aq))^(+)+NO_(3(aq))^(-)],` [more disorderly state]