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Standard XII
Chemistry
SN2 Reaction Mechanism
How will reco...
Question
How will recognise that a given reaction taking place in forward and backward direction to be exothermic or exothermic
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Q.
The reaction,
2
S
O
2
(
g
)
+
O
2
(
g
)
⇌
2
S
O
3
(
g
)
(Exothermic), will shift in forward direction by:
Q.
The forward and backward activation energy of exothermic reaction
A
→
B
is
80
and
280
k
J
m
o
l
−
1
respectively. The enthalpy change of the forward reaction
A
→
B
( in
k
J
/
m
o
l
) will be :
Q.
If
E
f
and
E
r
are the actication energies of forward and backward reactions and the reaction is known to be exothermic, then
Q.
The activation energies for forward and backward reactions are
E
f
a
n
d
E
b
respectively.
If the reaction is exothermic then:
Q.
3
H
2
(
g
)
+
N
2
(
g
)
⇌
2
NH
3
(
g
)
In Haber's Process, forward and backward reactions are exothermic and endothermic respectively.
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