6) Read the question below and respond. * For a reaction having a AH, = - 42 kJ, the activation energy energy 1 the forward reaction, Ewa is +63 kJ. What is Ee? O 105 kJ O -195 kJ O 63 kJ O 21 kJ O - 21 kJ 7) Why does increasing temperature increase reaction rate?* O A) At higher temperatures, the activation energy is lower. B) At higher temperatures, there are more collisions per unit time. O C) At higher temperatures, the particles have more kinetic energy. OD) Both A and B OE) Bothe B and C

6) Read the question below and respond. * For a reaction having a AH, = - 42 kJ, the activation energy energy 1 the forward reaction, Ewa is +63 kJ. What is Ee? O 105 kJ O -195 kJ O 63 kJ O 21 kJ O - 21 kJ 7) Why does increasing temperature increase reaction rate?* O A) At higher temperatures, the activation energy is lower. B) At higher temperatures, there are more collisions per unit time. O C) At higher temperatures, the particles have more kinetic energy. OD) Both A and B OE) Bothe B and C

Chemistry for Engineering Students

4th Edition

ISBN:9781337398909

Author:Lawrence S. Brown, Tom Holme

Publisher:Lawrence S. Brown, Tom Holme

Chapter11: Chemical Kinetics

Section: Chapter Questions

Problem 11.109PAE

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Bacteria cause milk to go sour by generating lactic acid. Devise an experiment that could measure the activation energy for the production of lactic acid by bacteria in milk. Describe how your experiment will provide the information you need to determine this value. What assumptions must be made about this reaction?
Based on the diagrams in Exercise 12.83, which of the reactions has the fastest rate? Which has the slowest rate?
Experiments have shown that the average frequency of chirping by a snowy tree cricket (Oecanthus fultoni) depends on temperature as shown in the table. Chirping Rate (per min) Temperature (C) 178 25.0 126 20.3 100. 17.3 What is the apparent activation energy of the process that controls the chirping? What is the rate of chirping expected at a temperature of 7.5C?
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Based on the kinetic theory of matter, what would the action of a catalyst do to a reaction that is the reverse of some reaction that we say is catalyzed?
Based on the diagram in Exercise 12.83, which of the reactions has the fastest rate? Which has the slowest rate?
For a certain reaction, Ea is 135 kJ and H=45 kJ. In the presence of a catalyst, the activation energy is 39% of that for the uncatalyzed reaction. Draw a diagram similar to Figure 11.14 but instead of showing two activated complexes (two humps) show only one activated complex (i.e., only one hump) for the reaction. What is the activation energy of the uncatalyzed reverse reaction?
Compare the functions of homogeneous and heterogeneous catalysts.
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If a textbook defined a catalyst as "a substance that increases the rate of a reaction," would that definition be adequate?
Experimental data are listed here for the reaction B: Time (s) IB] (mol/L) 0.00 0.000 10.0 0.326 20.0 0.572 30.0 0.750 40.0 0.890 Prepare a graph from these data, connect the points with a smooth line, and calculate the rate of change of [B] for each 10-s interval from 0.0 to 40.0 s. Does the rate of change decrease from one time interval to the next? Suggest a reason for this result. How is the rate of change of [AJ related to the rate of change of [B] in each time interval? Calculate the rate of change of [AJ for the time interval from 10.0 to 20.0 s. What is the instantaneous rate, A[B]/Ar, when [BI = 0.750 mol/L?