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Haley B.

asked • 06/07/18

What is the concentration of each gas once equilibrium is reached?

Can someone please let me know if I did this right? 
 
1.800 mole of N2O4(g) is injected into a closed 1.00L container.
Kc=4.66 x 10-3 at 298K
 
N2O4 (g) ⇌ 2NO2 (g)
 
what is the concentration of each gas once equilibrium is reached?
 
I set up an ICE table as follows:
 
I  1.80         0
C  -x           +2x
E  1.80-x     2x
 
then input the values from row E into Kc equation:
 
4.66 x 10-3= (2x)2
                  (1.80-x)
 
using the quadratic equation I found x= 0.0452, and x= -0.0463
 
using the positive value for x to find the concentrations of each gas at equilibrium, I found:
[N2O4]= 1.80-x
             1.80-0.0452
              1.75M
 
[NO2]= 2x
            2(0.0452)
            0.0904M
          
 
 

J.R. S.

tutor
Did you get my answer?  You did do the problem correctly.
Report

06/09/18

Haley B.

Great, thank you!
Report

06/09/18

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