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Byju's Answer
Standard XII
Chemistry
Heat of Reaction
A hypothetica...
Question
A hypothetical reaction
A
⟶
2
B
proceeds through the following sequence of steps:
I.
A
→
C
;
Δ
r
H
=
q
1
II.
C
→
D
;
Δ
r
H
=
q
2
III.
1
2
D
→
B
;
Δ
r
H
=
q
3
The heat of hypothetical reaction is:
A
q
1
+
q
2
−
2
q
3
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B
q
1
+
q
2
+
2
q
3
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C
q
1
+
2
q
2
−
2
q
3
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D
q
1
−
q
2
+
2
q
3
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Solution
The correct option is
C
q
1
+
q
2
+
2
q
3
A
⟶
C
q
1
C
⟶
D
q
2
D
⟶
2
B
2
q
3
A
⟶
2
B
q
1
+
q
2
+
2
q
3
Therefore, the heat of hypothetical reaction is
q
1
+
q
2
+
2
q
3
.
Hence, option B is correct.
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