In a study of the formation of NOx air pollution, a chamber heated to 2200°C was...

In a study of the formation of NOx air pollution, a chamber heated to 2200°C was filled with air (0.790 atm N2, 0.210 atm O2). What are the equilibrium partial pressures of N2, O2, and NO if Kp = 0.0490 for the following reaction: N2(g)+O2(g) ⇄ NO2(g)

Expert Solution

N2(g) + 2O2(g) ⇄ 2NO2(g)

I 0.79 0.21 0

C -x -2x 2x

E 0.79-x 0.21-2x 2x

Kp = P^2NO/PN2*P^2O2

0.049 = (2x)^2/(0.79-x)(0.21-2x)^2

0.049*(0.79-x)(0.21-2x)^2 = 4x^2

x = 0.017

PN2 = 0.79-x = 0.79-0.017 = 0.773atm

PO2 = 0.21-2x = 0.21-2*0.017 = 0.176atm

PNO2 = 2x = 2*0.017 = 0.034atm

queen_honey_blossom answered 2 years ago

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