# Problem: Calculate ΔG° for the reaction NH4NO3(s) → NH4+(aq) + NO3−(aq) to determine whether the reaction is spontaneous or not. Temperature: 298.15 K and ΔS°: 108.7 J/K•molCompound          ΔHf° (kJ/mol)NH4NO3(s)          −365.56NH4+(aq)             −132.51NO3−(aq)             −205.0A.  4.4 J , nonspontaneousB.  – 4.4 kJ, spontaneousC.  28.5 kJ spontaneousD.  −28.5 J nonspontaneousE.  5.6 kJ nonspontaneous

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###### Problem Details

Calculate ΔG° for the reaction NH4NO3(s) → NH4+(aq) + NO3(aq) to determine whether the reaction is spontaneous or not. Temperature: 298.15 K and ΔS°: 108.7 J/K•mol

Compound          ΔHf° (kJ/mol)

NH4NO3(s)          −365.56

NH4+(aq)             −132.51

NO3(aq)             −205.0

A.  4.4 J , nonspontaneous

B.  – 4.4 kJ, spontaneous

C.  28.5 kJ spontaneous

D.  −28.5 J nonspontaneous

E.  5.6 kJ nonspontaneous

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