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Byju's Answer
Standard XII
Chemistry
Relation between Kp and Kc
A mixture of ...
Question
A mixture of one mole of
C
O
2
and one mole of
H
2
attains equilibrium at
250
∘
C
and 0.1 atm.
C
O
2
+
H
2
→
C
O
+
H
2
O
Calculate
K
p
, if the analysis of final reaction mixture shows 0.16 volume percent of CO :
A
2.06
×
10
5
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B
10.3
×
10
5
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C
1.03
×
10
−
5
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D
2.06
×
10
−
5
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Solution
The correct option is
C
1.03
×
10
−
5
The equilibrium reaction is
C
O
2
+
H
2
→
C
O
+
H
2
O
.
The following table lists various quantities.
C
O
2
,
H
2
,
C
O
,
H
2
O
Initial moles:
1
1
0
0
Moles at equilibrium:
1
−
x
1
−
x
x
x
Total number of moles
=
1
−
x
+
1
−
x
+
x
+
x
=
2
.
For
C
O
, mole % is equal to volume %.
Thus
x
2
×
100
=
0.16
or
x
=
0.0032
.
As,
Δ
n
=
0
,
K
c
=
K
p
=
x
2
(
1
−
x
)
2
=
(
0.0032
)
2
(
1
−
0.0032
)
2
=
1.03
×
10
−
5
.
Suggest Corrections
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Similar questions
Q.
A mixture of one mole of
C
O
2
and one mole of
H
2
attains equilibrium at a temperature of
250
o
C
and a total pressure of 0.1 atm for the change
C
O
2
(
g
)
+
H
2
(
g
)
⇌
C
O
(
g
)
+
H
2
O
(
g
)
. Calculate
K
P
if the analysis of final reaction mixture shows 0.16 volume percent of
C
O
.
Q.
The mixture of one mole of
C
O
2
and one mole of
H
2
attains equilibrium at a temperature of
250
0
C
and total pressure of 0.1 atm for the change
C
O
2
(
e
)
+
H
2
(
e
)
⇌
C
O
2
(
e
)
+
H
2
0
e
, calculate
K
p
is the analysis of final reaction mixture shows
0.16
volume fraction of CO ?
Q.
For the reaction,
C
O
2
(
g
)
+
H
2
(
g
)
⇌
C
O
(
g
)
+
H
2
O
(
g
)
the value of Kc at
552
∘
C
is 0.137. If 5 moles of
C
O
2
, 5 moles of
H
2
, 1 mole of
C
O
and 1 mole of
H
2
O
are initially present what are the actual concentrations of
C
O
2
,
H
2
,
C
O
,
H
2
O
at equilibrium?
Q.
At
700
K
,
C
O
2
and
H
2
react to form
C
O
and
H
2
O
. For this process
K
c
is
0.11
. If a mixture of
0.45
mole of
C
O
2
and
0.45
mole of
H
2
is heated at
700
K
.
(i) Find out the amount of each gas at equilibrium state.
(ii) After equilibrium is reached another
0.34
m
o
l
e
of
C
O
2
and
0.34
m
o
l
e
of
H
2
are added to the reaction mixture. Find the composition of the mixture at the new equilibrium state.
Q.
At
675
K
,
H
2
(
g
)
and
C
O
2
(
g
)
react to form
C
O
(
g
)
and
H
2
O
(
g
)
,
K
p
for the reaction is
0.16
. If a mixture of
0.25
mole of
H
2
(g) and
0.25
mole of
C
O
2
is heated at
675
K
, mole percentage of
C
O
(
g
)
in equilibrium mixture is:
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