Thermodynamics and Keq (2)

2 NO2 ? N2O4

DGorxn = -4.8 kJ

pure NO2 has DGrxn < 0.

Reaction proceeds until DGrxn = 0 - the minimum in G(reaction) - see graph.

At this point, both N2O4 and NO2 are present, with more N2O4.

This is a product-favored reaction.

file://C:\chem_eve\9_G_NO2.mov

20m09an1.mov

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