47. Which of the following affects the activation energy of a reaction? temperature of the reactants concentrations of reactants А. В. presence of a catalyst surface area of reactants reaction progress C. D. Е.
47. Which of the following affects the activation energy of a reaction? temperature of the reactants concentrations of reactants А. В. presence of a catalyst surface area of reactants reaction progress C. D. Е.
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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kindly answer the following question below, choose the best answer. thank u so much
Transcribed Image Text:47. Which of the following affects the activation energy of a reaction?
А.
В.
С.
temperature of the reactants
concentrations of reactants
presence of a catalyst
surface area of reactants
D.
reaction progress
48. A catalyst accelerates a reaction because
Е.
А.
it increases the number of molecules with energy equal to or greater than the activation
energy.
В.
it lowers the activation energy for the reaction.
С.
it increases the number of collisions between molecules.
it increases the temperature of the molecules in the reaction.
it supplies energy to reactant molecules.
D.
Е.
49. When a catalyst is added to a reaction mixture, it
A.
increases the rate of collisions between reactant molecules.
В.
provides reactant molecules with more energy.
slows down the rate of the back reaction.
provides a new pathway (mechanism) for the reaction.
does none of these.
C.
D.
E.
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