Consider the following equilibrium: Now suppose a reaction vessel ls filled with

Question

Consider the following equilibrium: Now suppose a reaction vessel ls filled with 3.23 atm of dinitrogen tetroxide (N,O,) at 468. °C. Answer the following questions about this system 2 rise Under these conditions, will the pressure of N,O, tend to rise or fall? O fall NO, ts it possible to reverse this tendency by adding NO2 In other words, you said the pressure of N,O, wil tend to rise, can that be changed to a tendency to fall by adding NO.? Similarly, if you said the pressure of N2O4 will tend to fall, can that be changed to a tendency to rise by adding NO2 If you said the tendency can be reversed in the second question, caloulate the minimum pressure of NO2 needed to reverse it. Check Type here to search

Explanation / Answer

     N2O4(g) <=====> 2NO2(g)

pressure of N2O4 tend to fall

yes,

DG0 = -RTlnKp

5.4*10^3 = -8.314*(468+273.15)lnKp

   Kp = 0.4163

   Kp = pNO2^2/ pN2O4

0.4163 = (2X)^2/(3.23-X)

X = 0.53

minimum pressure of NO2 required to reverse the process = 2*0.53 = 1.06 atm

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