3. The following rate constants were measured for a particular reaction: ki = 2.5 x 101 s' at 300. K k2 = 7.8 x 10-1 s-l at 320. K a. Based on the units of the rate constant, what is the overall order of the reaction? b. What are the values of Ea and A for this reaction? c. What is the value of the rate constant at 350. K?

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Chapter1: Chemical Foundations
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3. The following rate constants were measured for a particular reaction:
ki = 2.5 x 101 s at 300. K
||
k2 = 7.8 x 10-1 sl at 320. K
a. Based on the units of the rate constant, what is the overall order of the reaction?
b. What are the values of Ea and A for this reaction?
c. What is the value of the rate constant at 350. K?
Transcribed Image Text:3. The following rate constants were measured for a particular reaction: ki = 2.5 x 101 s at 300. K || k2 = 7.8 x 10-1 sl at 320. K a. Based on the units of the rate constant, what is the overall order of the reaction? b. What are the values of Ea and A for this reaction? c. What is the value of the rate constant at 350. K?
4. Consider a hypothetical reaction involving two reactants.
X+Y → Z
a. Write a “generic" rate law for this reaction using variables for the orders of each
reactant.
b. We want to use the method of integrated rates to determine the order of the reaction
with respect to reactant Y. What should be true about the concentration of X in the
experiment in order to isolate the behavior of Y?
c. Write an expression for the pseudo rate constant that would be determined in part b
of this question assuming the concentration of X was 2.0 M and that it was known
that the reaction was first order in X
5. Sketch a reaction coordinate diagram for a hypothetical exothermic reaction involving a 2
step mechanism where the first step is rate limiting. Show the relative positions of the
reactants and products as well as the relative magnitudes of the activation energies for
each step.
Transcribed Image Text:4. Consider a hypothetical reaction involving two reactants. X+Y → Z a. Write a “generic" rate law for this reaction using variables for the orders of each reactant. b. We want to use the method of integrated rates to determine the order of the reaction with respect to reactant Y. What should be true about the concentration of X in the experiment in order to isolate the behavior of Y? c. Write an expression for the pseudo rate constant that would be determined in part b of this question assuming the concentration of X was 2.0 M and that it was known that the reaction was first order in X 5. Sketch a reaction coordinate diagram for a hypothetical exothermic reaction involving a 2 step mechanism where the first step is rate limiting. Show the relative positions of the reactants and products as well as the relative magnitudes of the activation energies for each step.
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