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Byju's Answer
Standard XII
Chemistry
Dehydration of Alcohols
A reaction ha...
Question
A reaction having equal energies of activation for forward and reverse reaction has 1)delta S=0 2)delta H=0 3)delta G =0 4)delta s=delta H=delta G=0
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Similar questions
Q.
The correct statement for an exergonic gaseous reaction
A
+
B
⟶
3
C
will be:
Q.
From application of thermodynamics on chemical reaction,
we get
Δ
G
=
Δ
G
0
+
R
T
ln Q
Also
Δ
G
=
Δ
H
−
T
Δ
S
.
If
Δ
G
=
0
, reaction is at equilibrium.
If
Δ
G
>
0
reaction is non-spontaneous under given condition.
I
f
Δ
G
<
0
, reaction is spontaneous under given condition.
Consider the reaction given below.
A
(
s
)
⇌
2
B
(
g
)
Δ
H
0
=
160
KJ/mol.
Δ
S
0
=
400
J/mol-K at
400
K
Which of the following is correct at
400
K?
Q.
For a reaction
A
⇌
P
, the plots of [A] and [P] with time temperatrues
T
1
and
T
2
are given below.
If
T
2
>
T
1
, the correct statement(s) is (are) (Assume
Δ
H
θ
and
Δ
S
θ
are independent of temperature and ratio of ln K at
T
1
to lnK at
T
2
is greater than
T
2
T
1
. Here H, S, G and K are enthalpy, entropy, Gibbs energy and equilibrium constant, respectively.)
Q.
Calculate
Δ
H
0
f
for
U
B
r
4
from
Δ
G
0
of reaction and the
S
0
values.
U
(
s
)
+
2
B
r
2
(
l
)
→
U
B
r
4
(
s
)
;
Δ
G
0
=
−
788.6
K
J
;
S
0
(
J
/
K
−
m
o
l
)
50.3
,
152.3
,
242.6
Q.
For a non-spontaneous reaction, at 30
0
C,
Δ
H>0
&
Δ
S > 0. The reaction becomes spontaneous,elta
by
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