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Byju's Answer
Standard XII
Chemistry
Characteristics of Equilibrium Constant
A mixture con...
Question
A mixture containing 2 moles of
N
2
and 3 moles of
H
2
gas is brought to equilibrium in a 3 L vessel.If the molar concentration of
N
H
3
at equilibrium is 1/3 mol/L, calculate the
K
c
for the formation of
N
H
2
.
N
2
(
g
)
+
3
H
2
(
g
)
⇌
2
N
H
3
(
g
)
Open in App
Solution
N
2
(
g
)
+
3
H
2
(
g
)
⇌
2
N
H
3
(
g
)
At
2
3
0
t
=
0
At
2
(
1
−
α
)
3
(
1
−
α
)
2
α
t
=
t
e
q
Volume of container
=
3
L
concentration
=
m
o
l
v
o
l
i
n
l
i
t
r
e
[
N
H
3
]
=
2
α
3
=
1
3
(
∵
given)
α
=
1
/
2
[
N
2
]
at equilibrium
=
2
(
1
−
α
)
3
=
1
3
[
H
2
]
at equilibrium
=
3
(
1
−
α
)
3
=
1
/
2
K
C
=
(
1
3
)
2
(
1
2
)
3
(
1
3
)
=
8
/
3
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0
Similar questions
Q.
1 mole of
N
2
and 3 moles of
H
2
are placed in 1L vessel. Find the concentration of
N
H
3
at equilibrium if the equilibrium constant
(
K
c
)
at 400K is
4
27
.
N
2
(
g
)
+
3
H
2
(
g
)
⇌
2
N
H
3
(
g
)
Q.
At a certain temperature (T), the equilibrium constant
(
K
c
)
is 1 for the reaction
N
2
(
g
)
+
3
H
2
(
g
)
⇌
2
N
H
3
(
g
)
If 2 moles of
N
2
,
4 moles of
H
2
,
6 moles of
N
H
3
and 3 moles of inert gas are introduced into a two litre rigid vessel at constant temperature T. It has been found that equilibrium concentration of
H
2
and
N
H
3
are equal then what is the equilibrium concentration of
N
2
(in M)?
Q.
Assertion :For reaction
N
2
(
g
)
+
3
H
2
(
g
)
⇌
2
N
H
3
(
g
)
Unit of
K
C
=
L
2
m
o
l
−
2
Reason: For the reaction
N
2
(
g
)
+
3
H
2
(
g
)
⇌
2
N
H
3
(
g
)
, Equilibrium constant
K
C
=
[
N
H
3
]
2
[
N
2
]
[
H
2
]
3
Q.
Calculate the equilibrium constant
(
K
c
)
for the formation of
N
H
3
in the following reaction:
N
2
(
g
)
+
3
H
2
(
g
)
⇌
2
N
H
3
(
g
)
At equilibrium, the concentration of
N
H
3
,
H
2
and
N
2
are
1.2
×
10
−
2
,
3.0
×
10
−
2
and
1.5
×
10
−
2
M
respectively.
Q.
An equilibrium mixture of
N
2
,
H
2
and
N
H
3
at
700
K contains
0.036
M
N
2
and
0.15
M
H
2
. At this temperature,
K
c
for the reaction
N
2
(
g
)
+
3
H
2
(
g
)
⇌
2
N
H
3
(
g
)
is
0.29
. What is the concentration of
N
H
3
?
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