For the reaction NH4Cl (s)→NH3 (g)  + HCl (g) at 25°C, ΔH = 176 kJ/moland ΔS = 0.285 kJ/(mol - K).

What is the ΔG, and will this reaction be spontaneous in the forward direction?
169 kJ/mol; no


91 kJ/mol; no


91 kJ/mol; yes


-91 kJ/mol; yes