Comment on the validity of the following statements, giving reasons: (i) Thermodynamically, an exothermic reaction issometimes not spontaneous. (ii) The entropy of steamis more than that of water at its boiling point. (iii)The equilibrium constant fora reaction isone or more if Delta_(r)G^(@)for it is less than zero.

Comment on the validity of the following statements, giving reasons:

1.	Comment on the validity of the following statements, giving reasons: (i) Thermodynamically, an exothermic reaction issometimes not spontaneous. (ii) The entropy of steamis more than that of water at its boiling point. (iii)The equilibrium constant fora reaction isone or more if Delta_(r)G^(@)for it is less than zero.
Answer» Solution :(i) Yes, the given statement is TRUE. This is because `DeltaG= Delta H -T Delta S`.For exothermic reaction, `DeltaH` is `-ve`. If `T DeltaS` is`+ve` (i.e.,entropy factor opposes the process) and `T DeltaS GT DeltaH` in magnitude, `DeltaG` will be`+ve` and process will bespontaneous. (ii) Yes, thegiven statement is true. This is becauseat the same temperature, gaseous state is more DISORDERED than the liquid state. (iii) `- DeltaG^(@) = RT`ln K. Thus, if `DeltaG^(@)` is less than ZERO, i.e., it is`-ve` , thenln KWILL be `+ve` and hence K will be greaterthan 1.