For the following equilibrium, Kc= 6.3 × 1014 at 1000 K

NO (g) + O3 (g) NO2 (g) + O2 (g)


Both the forward and reverse reactions in the equilibrium are elementary bimolecular reactions. What is Kc, for the reverse reaction?


Equilibrium constant for forward reaction is

Kcfwd =


For reverse reaction, Equilibrium constant is given as,


Kcrev =


= 1/Kcfwd


= 1/6.3×1014


= 1.59 × 10-15


[(Equilibrium constant for reverse reaction) = 1/(equilibrium constant of forward reaction)


i.e, Kcrev = ]


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