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Consider the reaction: NH3 (g) + HCl (g) → NH4Cl (s) Given the following table of thermodynamic data, Substance ∆Hf° (kJ/mol) S° (J/mol ∙ K) NH3 (g) -46.19 192.5 HCl (g) -92.30 186.69 NH4Cl (s) -314.4 94.6 determine the temperature (in °C) above which the reaction is nonspontaneous. A) This reaction is spontaneous at all temperatures. B) 345.0 C) 432.8 D) 1235 E) 618.1