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Question

When 36.8g N2O4 is introduced into a 1 litre flask at 300 K. The following reaction occurs:
N2O4(g)2NO2(g), KP=0.1642 atm.
Calculate the KC of the equilibrium reaction.

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Solution

N2O4(g)2NO2(g) ; Kp=0.1642atm
KP=KC(RT)Δn Δn=21=1, R=0.0820 L mol1k1,T=300K
0.1642=KC(0.082×300)1
KC=0.164224.6
=0.00667=6.67×103mol dm3

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