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Byju's Answer
Standard XII
Chemistry
Nernst Equation
Kc for the re...
Question
K
c
for the reaction
S
O
2
(
g
)
+
1
2
O
2
(
g
)
⇌
S
O
3
(
g
)
is
61.7
at
60
o
C. What is its unit? Calculate
K
p
for the reaction and write its unit?
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Solution
Unit of
K
c
for given reaction is
l
m
o
l
−
1
and with given coefficients the unit is
(
l
m
o
l
−
1
)
1
/
2
.
K
p
=
K
c
(
R
T
)
Δ
n
For given reaction
K
c
=
61.7
,
R
=
0.0821
,
T
=
60
+
273
=
333
K
and
Δ
n
=
number of moles of gaseous products
−
Number of moles of gaseous reactants
=
[
1
−
(
1
+
1
2
)
]
=
−
1
2
∴
K
p
=
61.7
(
0.0821
×
333
)
−
1
2
=
61.7
√
27.34
=
11.8
atm.
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Similar questions
Q.
The value of
(
K
p
/
K
c
)
for the reversible reaction
S
O
2
(
g
)
+
1
2
O
2
(
g
)
⇔
S
O
3
(
g
)
at constant temperature T is:
Q.
For the reaction,
S
O
2
(
g
)
+
1
2
O
2
(
g
)
⇌
S
O
3
(
g
)
, the value of
K
c
is
1.7
×
10
12
at
300
K
. Calculate the equilibrium constants for the following reactions at
300
K
:
(I)
2
S
O
2
(
g
)
+
O
2
(
g
)
⇌
2
S
O
3
(
g
)
(II)
S
O
3
(
g
)
⇌
S
O
2
(
g
)
+
1
2
O
2
(
g
)
Q.
For the reaction,
S
O
2
(
g
)
+
1
2
O
2
(
g
)
⇌
S
O
3
(
g
)
,
K
p
is
32
a
t
m
−
1
/
2
at
800
K
and
Δ
H
for the reaction is
−
187.9
k
J
m
o
l
−
1
. Calculate its value at
900
K
, if it is assumed that
Δ
H
remains constant over this range of temperature.
Q.
For the reaction,
S
O
2
(
g
)
+
1
2
o
2
(
g
)
⇌
S
O
3
(
g
)
if
K
p
=
K
C
(
R
T
)
x
, then x becomes:
Q.
For the reaction
S
O
2
(
g
)
+
1
2
O
2
(
g
)
⇌
S
O
3
(
g
)
, if
K
P
=
K
C
(
R
T
)
x
where the symbols have usual meaning then the value of
x
is: (assuming ideality)
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