Part A A certain reaction has an activation energy of 66.0 kJ/mol and a frequenc
ID: 1778419 • Letter: P
Question
Part A
A certain reaction has an activation energy of 66.0 kJ/mol and a frequency factor of A1 = 1.80×1012 M1s1 . What is the rate constant, k, of this reaction at 26.0 C ?
Express your answer with the appropriate units. Indicate the multiplication of units explicitly either with a multiplication dot (asterisk) or a dash.
Part B
An unknown reaction was observed, and the following data were collected:
Determine the activation energy for this reaction.
Express your answer with the appropriate units.
T(K) k
(M1s1) 352 109 426 185
Explanation / Answer
A)
A = 1.80 x 1012
T = 26 C = 26 + 273 = 299 K
Ea = activation energy = 66000
rate constant is given as
k = A e-Ea/(RT)
k = (1.80 x 1012) e-(66000)/(8.314 x 299)
k = 5.31
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