Rate of disappearance of the reactant A in the reversable and one step reaction A⇌B at two temperatures is given by
−d[A]dt=2.0×10−3s−1[A]−5.0×10−4s−1[B](at 27∘C)−d[A]dt=8.0×10−2s−1[A]−4.0×10−3s−1[B](at 127∘C)
The enthapy of the reaction in the given temperature range is
2.303×8.314×300×400100log 5J
K1 at 27∘C=2.0×10−35×10−4=4.0K2 at 127∘C=8×10−24.0×10−3=20logK2K1=ΔH2.303R[T2−T1]T1T2T1=300K,T2=400K