`DeltaS` is expected to be maximum for the reaction _____

Options

A. `Ca_((s)) + 1//2O_(2(g)) to CaO_((s))`
B. `C_((s)) + O_(2(g)) to CO_(2(g))`
C. `N_(2(g)) + O_(2(g)) to 2NO_((g))`
D. `CaCO_(3(s)) to CaO_((s)) +CO_(2(g))`

Answer

D

Explanation

In `CaCO_(3(s)) to CaO_((s)) +CO_(2(g))` , entropy change is positive . In (a) and (b) entropy change is negative , in (c ) entropy change is zero.