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Question

19. Calculate the ΔG°rxn for the reaction shown below.

           

                                  2 HNO₃(aq) + NO(g)   →    3 NO₂(g)   + H₂O(l)               

   ΔG°f (kJ/mol)          -110.9             87.6             51.3             -237.1

a) -162.5 kJ               b) +51.0 kJ                 c) -54.5 kJ                  d) +171.1 kJ

Answer 1

ΔGº rxn = [3(51.3 kJ/mol) + 1(-237.1 kJ/mol)] - [2(-110.9 kJ/mol) + 1(87.6 kJ/mol)]

= 51.0 kJ