In which of the following reactions,standard reaction entropy change`(DeltaS^(@))`is positive and standard Gibb,s energy change`(DeltaG^(@))`decreases sharply with increasing temperature?

Options

A. `C_(("graphite"))+(1//2)O_(2(g))rarrCO_((g))`
B. `CO_(g)+(1//2)O_(2(g))rarrCO_(2(g))`
C. `Mg_(s)+(1//2))O_(2(g))rarrMgO_(s)`
D. `(1//2)C("graphite")+(1//2)O_(2)(g)rarr(1//2)CO_(2(g))`

Answer

A

Explanation

`Deltan_g = 1-1//2 =1//2 , Delta S = +ve `