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Byju's Answer
Standard XII
Chemistry
Heat of Reaction
For the gas p...
Question
For the gas phase decomposition:
P
C
l
5
(
g
)
Δ
⇌
P
C
l
3
(
g
)
+
C
l
2
(
g
)
A
Δ
H
<
0
,
Δ
S
<
0
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B
Δ
H
>
0
,
Δ
S
>
0
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C
Δ
H
>
0
,
Δ
S
<
0
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D
Δ
H
<
0
,
Δ
S
>
0
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Solution
The correct option is
A
Δ
H
<
0
,
Δ
S
<
0
For a equilibrium reaction,
Δ
G
=
0
So
Δ
H
=
T
×
S
As the moles in product side are more so entropy increased and according to the formula
H
depend upon the
S
. So, both are increasing.
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