Answered: An unknown reaction was observed, and…

An unknown reaction was observed, and the following data were collected: T k (К) (M 1.s 1) 352 109 426 185 Determine the activation energy for this reaction.

Chemistry: An Atoms First Approach

2nd Edition

ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Steven S. Zumdahl, Susan A. Zumdahl

Chapter11: Chemical Kinetics

Section: Chapter Questions

Problem 98CWP: A certain reaction has the form aAProducts At a particular temperature, concentration versus time...

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Question

Review Constants Periodic Tal
III K
III A
9.
There are several factors that affect the rate
constant of a reaction. These factors include
т
Ea
where y is In k, m is the slope or
x is
-, and b is the y-intercept or In A. The linearity of this
temperature, activation energy, steric factors
(orientation), and also collision frequency, which
changes with concentration and phase. All the
factors that affect the rate constant can be
R
T
equation is illustrated graphically in the image.(Figure 1)
summarized in an equation called the Arrhenius
equation:
Part B
k = Ae Ea/RT
where k is the rate constant, A is the frequency
factor, Ea is the activation energy,
R= 8.314 J/(mol · K) is the universal gas
constant, and T is the absolute temperature.
An unknown reaction was observed, and the following data were collected:
k.
(K)
(M-1.s 1)
352
109
426
185
Determine the activation energy for this reaction.
Figure
1 of 1
Express your answer with the appropriate units.
View Available Hint(s)
slope =
Value
Units
In k
Submit

Part A
A certain reaction has an activation energy of 64.0 kJ/mol and a frequency factor of A1 = 8.70x1012
Ms.What is the rate constant, k, of this reaction at 28.0 °C ?
%3D
Express your answer with the appropriate units. Indicate the multiplication of units explicitly either
with a multiplication dot (asterisk) or a dash.
> View Available Hint(s)
HẢ
k =
Value
Units
Submit
The linear form of the Arrhenius equation
The Arrhenius equation can be rearranged to a form that resembles the equation for a straight line:
Ea
In k
(금) + InA
In A
R
m
Ea
where y is In k, m is the slope or
x is , and b is the y-intercept or In A. The linearity of this
R
T
equation is illustrated graphically in the image.(Figure 1)

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