A first-order reaction is 50 % completed in 20 min at 27oC and in 5 min at 47oC. The energy of activation (in kJ/mol) of reaction is:
55.14
43.85
11.97
6.65
Given,
A first-order reaction is 50 % completed in 20 min at 27oC and in 5 min at 47oC.
Case 1 ; T1= 27oC = 300 K , t1/2 = 20 min
Case 1 ; T2= 47oC = 320 K , t1/2 = 5 min
Now,
Arrhenius Equation -
= Rate constant
So,
Take both sides (ln)-
Put values from the above calculations-