If L was lowered by adding a catalyst, which of the following would be correct? 70- 60- 50 40- 30- 20. 10 Reaction Coordinate The activation energy and heat of reaction would increase. The activation energy would remain constant, but the heat of reaction would decreas The activation energy would decrease, but the heat of reaction would remain constar O The activation energy and heat of reaction would decrease. Potential Energy (kl/mol)

If L was lowered by adding a catalyst, which of the following would be correct? 70- 60- 50 40- 30- 20. 10 Reaction Coordinate The activation energy and heat of reaction would increase. The activation energy would remain constant, but the heat of reaction would decreas The activation energy would decrease, but the heat of reaction would remain constar O The activation energy and heat of reaction would decrease. Potential Energy (kl/mol)

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Two diagrams of reactions are shown. What is the change in energy and activation energy for each?
Reaction Rates: Select both of the statements that are true. O As a reaction progress at a constant temperature, the rate of the reaction decreases as concentration of reactants increases leading to less collisions. O When the temperature increases the reaction rate increases as the particles have less energy O As a reaction progresses at a constant temperature, the rate of the reaction increases as concentration of reactants increases leading to less collisions. O As a reaction progress at a constant temperature, the rate of the reaction decreases as concentration of reactants decreases leading to less collisions. O When the temperature increases the reaction rate increases as the particles have more energy O When the temperature decreases the reaction rate increases as the particles have more energy
Which of the following will decrease the activation energy, Ea, of a reaction? O Increasing the reactant concentrations Removing the products as they form O Increasing the temperature O Adding a catalyst O Decreasing the pressure A Moving to another question will save this response. M esc 20 F3 F1 F2 F4 F5 @ #3 24 4 Q W R. A
Which of the following changes would most likely increase the rate of a reaction? a. increasing the size of the reactant particles b. decreasing the reaction temperature c. decreasing the concentration of a reactant d. decreasing the activation energy for the reaction
Generally, increasing the temperature increases the rate of a reaction. This is because: O increasing the temperature increases the frequency of collisions O increasing the temperature increases the average energy of the collisions and increases the frequency of collisions O increasing the temperature lowers the activation energy of the reaction increasing the temperature increases the average energy of the collisions.
Select the description that represents the use of a homogenous catalyst. O Production of oxygen gas from ozone using gaseous chlorine atoms. Making ammonia in the presence of solid iron. Using solid palladium to convert carbon monoxide into carbon dioxide. O Hydrogenation of an vegetable oil in the presence of solid platinum.
Increasing the temperature of a reaction increases the reaction rate and the rate constant. Select one: O True O False
Which of the following is/are true regarding catalysis O a. The rate constant remains the same O b. none of the above O c. All of the catalyst is consumed during the reaction O d. The activation energy is decreased
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2. A chemical reaction is initiated. As time passes, the rate decreases. Explain. 3. On the energy diagram below, label the following: • Reactant(s) • Product(s) Activation energy Uncatalyzed reaction pathway • Catalyzed reaction pathway AE A+B Extent of Reaction →
Which factor, if increased in magnitude, will slow the rate of a reaction. O frequency factor O temperature O activation energy O concentration of a reactant