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JEE Main20204 Sep 2020Evening ShiftChemistryChemical KineticsActual

The number of molecules with energy greater than the threshold energy for a reaction increases five fold by a rise of temperature from 27 o C to 42 o C . Its energy of activation in J / mol is _________ (Take ln 5 = 1 . 6094 ; R = 8 . 314 J mol - 1 )

Correct answer

0

Step-by-step solution

k = Ae - Ea RT ln K 2 K 1 = Ea R 1 T 1 - 1 T 2 ln ( 5 ) = Ea 8 . 314 1 300 - 1 315 1 . 6094 = Ea 8 . 314 15 300 × 315 Ea = 84297   J

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