Part A A certain reaction has an activation energy of 66.0 kJ/mol and a frequenc

Question

Part A

A certain reaction has an activation energy of 66.0 kJ/mol and a frequency factor of A1 = 7.30×1012 M1s1 . What is the rate constant, k, of this reaction at 23.0 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.

Explanation / Answer

K = A*exp(-E/(RT))

K = (7.3*10^12)(exp(-66000/(8.314*295)) = 15.014

B

apply ahrrenius ratios

ln(K2/K1) = -E/R*(1/T1-1/T2)

ln(185/109) = E/(8.314)(1/352 - 1/426)

E = 8.314*ln(185/109)/(1/352 - 1/426) = 8912.3607 J/mol

E = 8.9 kJ/mol

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