Question

the high
automobile engines
engines from
g
11
uatior
the
MICAL EQUILIBRIUM
The air pollutant NO is produced in
temperature reaction N2(g) + O2(g)
ZNO (g); K = 1.7 x 10 at 2300 K. If the
initial concentrations of N2 and O2 at
2300 K are both 1.40 M, what are the
concentrations of NO, N2 and O2 when
on the reaction mixture reaches equilibrium?​

Answer 1

Explanation:

Initial concentration (M)

1.40

1.40

0

Equilibrium concentration (M)

1.40−x 1.40−x

2x

Let x be the change in the concentration of nitrogen and oxygen.

The equilibrium constant expression is:

K

c

=

[N

2

][O

2

]

[NO]

2

substitute values in the above expression:

1.7×10

3

=

(1.40−x)(1.40−x)

(2x)

2

Taking square root on both sides-

41.23=

1.40−x

2x

1.40−x=0.0485x

Initial concentration (M)

1.40

1.40

0

Equilibrium concentration (M)

1.40−x 1.40−x

2x

Let x be the change in the concentration of nitrogen and oxygen.

The equilibrium constant expression is:

K

c

=

[N

2

][O

2

]

[NO]

2

substitute values in the above expression:

1.7×10

3

=

(1.40−x)(1.40−x)

(2x)

2

Taking square root on both sides-

41.23=

1.40−x

2x

1.40−x=0.0485x

x=1.34

x=1.34