Which of the following statements below is true concerning the activation energy for a reaction? O The greater the activation energy, the faster the reaction. The activation energy speeds up a reaction by finding an alternate pathway. E, is the difference in energy between reactants and products. O E, is the difference in energy between reactants and transition state. E, decreases with increasing temperature.

Which of the following statements below is true concerning the activation energy for a reaction? O The greater the activation energy, the faster the reaction. The activation energy speeds up a reaction by finding an alternate pathway. E, is the difference in energy between reactants and products. O E, is the difference in energy between reactants and transition state. E, decreases with increasing temperature.

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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Select the true statement regarding catalysis of chemical reactions Catalysts appear in the overall reaction equation. Catalysts decrease the reaction enthalpy. Catalysts decrease the activation energy. O The catalyzed and uncatalyzed versions of a chemical reaction have the same mechanism. Catalysts decrease the reaction rate.
For the chemical reaction system described by the diagram below, which statement is true? Energy Reaction Progress The activation energy for the reverse reaction is greater than the activation energy for the forward reaction. O The forward reaction is endothermic. O The activation energy for the forward reaction is greater than the activation energy for the reverse reaction. O At equilibrium, the activation energy for the forward reaction is equal to the activation energy for the reverse reaction. O The reverse reaction is exothermic.
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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.
Which of the following statements is false. Catalysts make a reaction rate go faster by providing a different route for the same reaction to proceed that requires less input energy. Increasing the concentration increases the rate of a reaction because more molecules are available in the same amount of space leading to more collisions with the correct orientation. Adding energy increases the rate of a reaction because more collisions happen with enough energy to break the bonds. Increasing the pressure by adding an inert gas increases the rate of reaction by causing more collisions.
catalyst? How does a catalyst change the rate of a reaction without affecting its equilib- rium?
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How does adding a catalyst affect the rate of a chemical reaction? Has no effect on the rate of a reaction Decreases the reaction rate since there will be less reactants to from products quickly. Decreases the rate of reaction because the reactants molecules have lower kinetic energy limiting collisions Increases the rate of reaction by lowering the activation energy of the reaction without being used up in the reaction
Consider the attached energy diagram for the conversion of A → G. Question: Which points on the graph correspond to reactive intermediates?
Which of the following is true? Decreasing the activation energy decreases the reaction rate. Decreasing the activation energy increases the reaction rate. The activation energy of an exothermic reaction is negative. There is no relationship between activation energy and reaction rate.
Which is true? A slow reaction has low activation energy. A fast reaction has large activation energy. The size of the activation energy tells us about the reaction rate. The size of the activation energy tells us about the reaction mechanism.
Raising the temperature of a reaction causes which of the following? O The rate of reaction will increase. O The rate of reaction will not change. O The rate of reaction will decrease. O None of these.