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Consider the following chemical reaction and free energies of formation in the table: 4 NH3(g) +...

Consider the following chemical reaction and free energies of formation in the table:

4 NH3(g) + 7 O2(g) → 4 NO2(g) + 6 H2O(l)

Calculate ∆G°rxn (kJ) for the reaction. Only enter a numerical value.  

Products or reactants ∆G°f, kJ/mol
NH3(g) -17
O2(g) 0
NO2(g) +52
H2O(l) -237
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