Given below is an expression for the rate constant of a first-order reaction occurring at a certain temperature, T (K). k = 14.34 - 1.25 10 4 T The energy of activation in kcal mol -1 for the reaction is : (Given: k in s -1 , R = 1.987 cal mol -1 K -1 )

1. A. 12.42
2. B. 18.63
3. C. 14.34
4. D. 24.84

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