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Question

Rate of disappearance of the reactant A in the reversable and one step reaction AB at two temperatures is given by
d[A]dt=2.0×103s1[A]5.0×104s1[B](at 27C)d[A]dt=8.0×102s1[A]4.0×103s1[B](at 127C)
The enthapy of the reaction in the given temperature range is


A

2.303×8.314×300×400100log 5J

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B

2.303×8.314×300×400100log 50J

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C

2.303×8.314×300×400100log 5J

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D

1002.303×8.314×300×400log 5J

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Solution

The correct option is C

2.303×8.314×300×400100log 5J


K1 at 27C=2.0×1035×104=4.0K2 at 127C=8×1024.0×103=20logK2K1=ΔH2.303R[T2T1]T1T2T1=300K,T2=400K


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