Question

An example of a reaction where ∆G = 0 is
   all acid-base reactions
   H2O(g)→H2O(l) @STP
   any reaction that is over
   H2O(g)→ H2O(s) @STP

Which reaction below is spontaneous at SATP?
   ∆Hº=34.1 kJ and ∆Sº=46.2 J/K
   ∆Hº=71.7 kJ and ∆Sº=-4.25 J/K
   ∆Hº=-11.1 kJ and ∆Sº=-61.8 J/K
   ∆Hº=9.95 kJ and ∆Sº=57.4 J/K

Answer 1

Answer :    ∆Hº = 9.95 kJ and ∆Sº = 57.4 J/K

Explanation :

∆Gº = ∆Hº - T ∆Sº

          = 9.95 - 273 x 0.0574

          = - 5.7 kJ

here ∆Gº < 0 . so this condition is spontaneous.

in remaining all cases , ∆Gº is > 0 .