For which of the following reactions, `DeltaS` is not positive :

Options

A. `I_(2)(s) to I_(2)(g)`
B. `CuO(s) + H_(2)(g) to Cu(s) + H_(2)O(l)`
C. `2O_(3) (g) to 3O_(2)(g)`
D. `CH_(4)(g) + 2O_(2)(g) to CO_(2)(g) + 2H_(2)O_(g)`

Answer

B

Explanation

`DeltaG^(@) = -Rt "log K`
`(DeltaG^(@))/(RT) = -2.303` log K