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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%23 Consider a hypothetical chemical reaction: A+B → C+D (In this equation A, B, C and D stand for some unknown chemical formulas.) Here is an energy diagram for the reaction: 400 300 energy 200 (k]/mol) C + D 100 - A + B reaction coordinate Use the energy diagram to answer these questions. What is the heat of reaction? O KJ/mol O Exothermic Is the reaction exothermic or endothermic? O Endothermic O Neither 00 O Yes, it's kJ/mol Can you determine the activation energy? Explanation Check O 2021 McGraw-Hill Education. AI Rightseserve Terms of MacBook Air 30 88 esc F10 F7 F6 F9 F1 F2 F3 F5 @ #3 24 % & 8. 6.
Which statements explains the energy requirements of chemical reactions? A) The rate of reaction increases with both increasing temperature and activation energy. B) The rate of reaction increases with increasing temperature and decreasing activation energy. C) The rate of reaction increases with decreasing temperature and increasing activation energy. D) The rate of reaction increases with both decreasing temperature and activation energy.
The catalyst influences the rate of reaction in which ways? nothing happens O Decreases it O Increases it O Stops the reaction
Which of the following will not affect the reaction rate of a reaction? Increasing the surface area of a solid reactant. use of a catalyst Changing the pressure of the air in the room O increasing the concentration of the reactants All affect the reaction rate of a reaction.
How does a catalyst influence the rate of a reaction?
Reaction rate increased by an increase of surface area of a reactant. One way to increase surface area is to add catalyst crush solid reactant into smaller pieces increase reactant's temperature increase reactant's concentration
Which of the following is a definition of the activation energy of a reaction? O the difference in Gibbs free energy between the reactants and the transition state the difference in Gibbs free energy between the reactants and the intermediate O the difference in Gibbs free energy between the reactants and the product O the difference in Gibbs free energy between the transition state and the product
If the energy of activation is lowered for a chemical reaction, which is true? OThe reaction proceeds faster The reaction must be exothermic OThe reaction does not occur O The reaction must be endothermic The reaction proceeds slower
A chemical species that is not consumed during a chemical reaction and increases the rate of the reaction is referred to as a(n): A inhibitor. B catalyst. C spectator ion. D reactive intermediate.
Enzymes are important molecules in biochemistry that catalyze reactions. The energy diagram illustrates the difference between a catalyzed reaction and an uncatalyzed reaction. Label the energy diagram. 11 Answer Bank products reactants (substrate) activation energy uncatalyzed reaction reaction progress catalyzed reaction transition state free energy AG for reaction
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
How does subdividing (grinding up) the reactants affect the rate of a chemical reaction? O It decreases the rate by giving the reactants the wrong orientation for reacting. O It increases the rate by lowering the energy of activation (E,). O It increases the rate by giving more molecules enough energy to react. O It decreases the rate by raising the energy of activation (E). O It increases the rate by increasing the surface area or effective concentration of the reactants.