Calculate the ΔG°rxn using the following information.

4 HNO3(g) + 5 N2H4(l) → 7 N2(g) + 12 H2O(l)

ΔH°f (kJ/mol) -133. 9 50. 6 -285. 8

S°(J/mol∙K) 266. 9 121. 2 191. 6 70. 0

ΔG°rxn = ?

2)What can you conclude about ΔG°rxn for the reaction at 25°C?