Chemical Reaction Rates and Inhibitors
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Questions and Answers

What is the primary purpose of activation energy in a chemical reaction?

  • To increase the temperature of the reactants
  • To provide enough energy to break chemical bonds and start the reaction (correct)
  • To act as an inhibitor and slow down the reaction
  • To increase the surface area of the reactants

How does the activation energy level relate to the overall energy change of a reaction?

  • The activation energy level is equal to the overall energy change
  • The activation energy level must be higher than the overall energy change
  • The activation energy level is independent of the overall energy change
  • The activation energy level must be lower than the overall energy change (correct)

In an exothermic reaction, what is the relationship between the activation energy and the energy released by the reaction?

  • The activation energy is unrelated to the energy released
  • The activation energy is less than the energy released (correct)
  • The activation energy is equal to the energy released
  • The activation energy is greater than the energy released

How does increasing the concentration of reactants affect the rate of a chemical reaction?

<p>Increasing concentration increases the rate of reaction (C)</p> Signup and view all the answers

What is the role of a catalyst in a chemical reaction?

<p>A catalyst decreases the activation energy required for the reaction (C)</p> Signup and view all the answers

How does increasing the surface area of the reactants affect the rate of a chemical reaction?

<p>Increasing surface area increases the rate of reaction (D)</p> Signup and view all the answers

What is the role of temperature in a chemical reaction?

<p>Increasing temperature decreases the activation energy required for the reaction (A)</p> Signup and view all the answers

How do inhibitors affect the rate of a chemical reaction?

<p>Inhibitors decrease the rate of reaction by increasing the activation energy (B)</p> Signup and view all the answers

What is the relationship between the activation energy and the energy change of a reaction?

<p>The activation energy is always greater than the energy change of the reaction (B)</p> Signup and view all the answers

How does the presence of a catalyst affect the activation energy of a chemical reaction?

<p>The catalyst decreases the activation energy required for the reaction (C)</p> Signup and view all the answers

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