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Kc=170 mol^-1 dm^3 at 298K for the equilibrium system: 2NOâ‚‚(g) reversable reaction Nâ‚‚Oâ‚„(g). If a 5dm^3 flask*?

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* contains 1x10^-3 mol of NO₂ and 7.5x10^-4 of N₂O₄, :

IS THE SYSTEM AT EQULIBRIUM? IS THERE ANY TENDENCY FOR THE CONC. OF NO₂ TO CHANGE AND, IS SO, WILL IT INCREASE OR DECREASE?

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  1. 2 NO2 <----> N2O4

    Qc = 7.5 x 10^-4 / ( 1 x 10^-3)^3 = 750 >> Kc

    the equilibrium will shift on the left and the concentration of NO2 will increase

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