What statement about the catalyst is correct? O it increases a value of the equilibrium constant It increases the number of collisions between reacting molecules. It makes the reaction more endothermic. It provides an alternative reaction mechanism with a lower activation energy. O It shifts an equilibrium to the right

What statement about the catalyst is correct? O it increases a value of the equilibrium constant It increases the number of collisions between reacting molecules. It makes the reaction more endothermic. It provides an alternative reaction mechanism with a lower activation energy. O It shifts an equilibrium to the right

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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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.
Consider the following general reaction for which gases A and B are mixed.in a constant volume container: A(g) + B(g) -> C(g) + D(g) According to collision theory, what happens to the rate of the reaction under the following changes: (consider each change separately) increase the temperature decrease the temperature increase the volume there is no change to the reaction rate A. decrease the volume the reaction rate increases В. decrease the pressure the reaction rate decreases C. collision theory does not allow you to predict the change in reaction rate increase the pressure D. decrease the concentration increase the concentration
use the collision theory to explain why concentration has this effect on reaction rates
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.
Initial concentration of the reactant/s and the concentration at equilibriumA. If the first quantity is less than the second quantityB. If the first quantity is greater than second quantityC. If the two quantities are equalD. If the two quantities cannot be compared
At chemical equilibrium, what is true about the forward rate and reverse rate? The forward rate is greater than the reverse rate The forward rate is less than the reverse rate The forward rate is changing faster than the reverse rate The forward rate is the same as the reverse rate
2. A catalyst is a substance that increases the rate of a chemical reaction but is not consumed by the reaction. A catalyst works by lowering the activation energy for a reaction, making it easier for reactants to form products. What effect, if any, would a catalyst have on a system already at equilibrium? Briefly explain.
A reaction begins with a solution containing reactants but no products. When the reaction reaches equilibruim a) The enthalpies of the reactants and products are equal b) The concentrations of the reactants and products are equal c) The equilibrium constant has decreased relative to its value at the start of the reaction d) The forward and reverse rate constants are equal e) None of the above
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
Potential Energy Diagram B A Reaction Progress Use the Potential Energy Diagram. What is shown by the letter A? the activation energy of the forward reaction the activation energy of the reverse reaction the transition state the heat of reaction the entropy of the reaction Potential Energy