Chemistry - Chemical Kinetics Question with Solution | TestHub

ChemistryChemical KineticsMiscellaneous/MixedEasy2 minPYQ_2020
ChemistryEasysingle choice

For a first order reactionA→P,the temperature (T) dependent rate constantkwas found to follow the equationlog⁡k=-20001T+6.0.The pre-exponential factor A and the activation energyEa,respectively, are

Options:

Answer:
D
Solution:

logk=logA− E a 2.303RT          ...(1)

Also given logk=6.0−( 2000 ) 1 T …(2)

On comparing equations, (1) and (2) logA=6.0⇒A= 10 6 s −1

and E a 2.303R =2000;

⇒ E a =2000×2.303×8.314

=38.29kJmol −1

Stream:NTA_ABHYASSubject:ChemistryTopic:Chemical KineticsSubtopic:Miscellaneous/Mixed
⏱ 2mℹ️ Source: PYQ_2020

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