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Byju's Answer
Standard XII
Chemistry
Hess' Law
In the synthe...
Question
In the synthesis of Ammonia by Haber's Processs.
N
2
(
g
)
+
3
H
2
(
g
)
⇌
2
N
H
3
(
g
)
at
500
∘
C, the value of
K
p
was found to be 0.5. Calculate the value of
K
c
.
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Solution
K
p
=
K
c
(
R
T
)
Δ
n
where,
K
p
=
0.5
(given)
R
=
0.083
b
a
r
d
n
3
T
=
500
∘
C
=
500
+
273
=
773
k
Δ
n
=
2
−
4
=
−
2
k
c
=
k
p
(
R
T
)
Δ
n
=
0.5
(
0.083
×
773
)
−
2
=
0.5
(
0.083
×
773
)
2
=
2063.15
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Similar questions
Q.
In the manufacture of ammonia by Haber's process,
N
2
(
g
)
+
3
H
2
(
g
)
⇋
2
N
H
3
(
g
)
+
92.3
kJ. Which of the following conditions is unfavourable?
Q.
The equilibrium constant
K
c
for the reaction
N
2
(
g
)
+
3
H
2
⇌
2
N
H
3
(
g
)
is
0.286
at
500
o
C
. Calculate
K
c
and
K
p
for the reaction
2
N
H
3
(
g
)
⇌
N
2
(
g
)
+
3
H
2
(
g
)
.
Q.
N
2
(
g
)
+
3
H
2
(
g
)
⇌
2
N
H
3
(
g
)
Value of
K
c
for the formation of ammonia according to the above equation is :
Q.
For the reversible reaction
N
2
(
g
)
+
3
H
2
(
g
)
⇔
2
N
H
3
(
g
)
at
500
∘
C
the value of
K
p
is
1.44
×
10
−
5
when partial pressure is measured in atmospheres. The corresponding value of
K
c
with concentration of
m
o
l
e
.
l
i
t
−
1
is:
Q.
For the synthesis of ammonia at 300 K :
N
2
(
g
)
+
3
H
2
(
g
)
→
2
N
H
3
(
g
)
Calculate the value of
Δ
G
0
?
N
2
H
2
N
H
3
Δ
H
0
_{f}(Kcal/mole)$
0
0
-10
S
0
(
C
a
l
/
K
−
m
o
l
e
)
40
30
45
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