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Q.

The activation energy of the backward reaction exceed, that of the forward reaction by 2RT (inJmol1). If the Pre- Exponential factor of the forward reaction is 4 times that of the reverse reaction. The absolute value of ΔG0(inJmol1) for the reaction at 300 k is_______
(given : ln(2)=0.7 RT = 2500Jmol1 at 300k and G is the Gibb’s energy)
 

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answer is 8500.

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Detailed Solution

Eb=Ef+2RTEfEb=2RT(1)Af=4AbKf=AFeEf/RTKb=AbeEb/RT
Keqm=KfKKeqm=4AbeEf/RTAbeEb/RTKeqm=KfKb=4eEfEbRTKeqm =4r+2ΔG=RTlnKeqmΔG0=2500ln4.e+2ΔG0=2500ln(2+ln4)ΔG0=2500ln(3.4)ΔG0=8500J/mol

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