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. The catalyzed and uncatalyzed versions of a chemical reaction have the same mechanism. O Catalysts decrease the reaction rate.

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. The catalyzed and uncatalyzed versions of a chemical reaction have the same mechanism. O Catalysts decrease the reaction rate.

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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Addition of a catalyst to a reaction lowers the activation energy of at least one step in the reaction
How does the presence of a catalyst influence the rate of a chemical reaction, and what is the underlying mechanism behind this phenomenon?
The rate of a reaction is how quickly the reaction goes to completion. If two reactions have the same amount of reactant, increasing the rate does not increase the amount of product produced, it simply reduces the time that it takes to make the product. Using the internet , research the four factors below that affect the rate of a chemical reaction. 1. Reactant concentration ( explained with details and add graphs to explain what you wrote for each one of them) 2. pressure ( explained with details and add graphs to explain what you wrote for each one of them) 3. Temperature ( explained with details and add graphs to explain what you wrote for each one of them) 4. Presence of a catalyst. ( explained with details and add graphs to explain what you wrote for each one of them) Your work should be written in complete sentences, and assume your audience is grade 11 chemistry students who do not understand this unit. Make sure all research is put into your own words!
What does it mean for a reaction to release energy? The relative potential energy of the reaction is negative. The activation energy of the reaction is positive. The relative potential energy of the reaction is positive. The activation energy of the reaction is negative.
Which of these are factors that impact rate of reaction? temperature reactant concentration presence of a catalyst O reactant particle size
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
Which of the following will lower the activation energy for a reaction? Group of answer choices raising the temperature of the reaction. increasing the concentrations of reactants. increasing the surface area of the reactants. adding a suitable catalyst.
Catalysts speed up the rate of a reaction by increasing the activation energy Select one: O True O False
Determine whether the following aspects of a reaction are increased, decreased, or unaffected by the addition of a catalyst. •rate of the forward reaction •rate of the reverse reaction •activation energy of the forward reaction •activation energy of the reverse reaction •the enthalpy of the reaction
What is the difference between exergonic and exothermic? What is the difference between intermediate and transition state? What is the relation between activation energy and the rate of a reaction?
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 statement regarding catalyst is incorrect It is regenerated during the reaction O increases the rate of a reaction by O providing an alternative mechanism The catalyst provided a mechanism O .with a higher activation energy The catalyst participates in the O reaction