chem

2NO(g) + O2(g) = 2NO2
If there are .02 moles of O2, .04 moles of NO, and .96 moles of 2NO2, calculate Kp if the total pressure is .2 atm.

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  1. The partial pressures are:
    (0.02/1.02) * 0.2 = 0.00392 atm O2
    (0.04/1.02) * 0.2 = 0.00784 atm NO
    (0.96/1.02) * 0.2 = 0.1882 atm NO2

    Now calculate the appropriate Kp value.

    Kp = PCO2^2/[PNO^2*PO2]

    This assumes that mixture is in chemical equlibrium. This is not always the case.

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