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JEE Main 20206 SeptemberEvening Shift
Exam
JEE Main
Year
2020
Date
6 September
Shift
Evening Shift
Subject
Chemistry
Chapter
Chemical Kinetics

JEE Main 2020 · 6 September · Evening Shift · Chemistry · Chemical Kinetics

The rate of a reaction decreased by 3 . 555 times when the...

The rate of a reaction decreased by 3.5553 . 555 times when the temperature was changed from 40°Cto30°C40 ° Cto30 ° C. the activation energy (in kJmol−1kJ{mol}^{- 1}) of the reaction is ________ .

Correct answer

0

Step-by-step solution

log⁡(k2k1)=Ea2.303R[1T1−1T2]\log \left(\dfrac{{k}_{2}}{{k}_{1}}\right) = \dfrac{Ea}{2 .303 R}\left[\dfrac{1}{{T}_{1}} - \dfrac{1}{{T}_{2}}\right]

log⁡(3.555)=Ea2.303R[1303−1313]\log \left(3 .555\right) = \dfrac{Ea}{2 .303 R}\left[\dfrac{1}{303} - \dfrac{1}{313}\right]

1.268×8.314×303=10Ea1 .268 \times 8 .314 \times 303 = 10Ea

So, Ea=100kJEa = 100kJ

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