Chemical Kinetics: Rates and Mechanisms of Reactions
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Questions and Answers

What does chemical kinetics study?

  • The products of chemical reactions
  • The rates and mechanisms of chemical reactions (correct)
  • The rates of chemical reactions only
  • The mechanisms of chemical reactions

    • What is an important factor in determining the rate of a chemical reaction?

  • Smell of the reactants
  • Nature of the reactants (correct)
  • Nature of the products
  • Color of the reactants

    • Why do reactions occur faster at higher temperatures?

  • Because molecules have more energy (correct)
  • Because molecules are lighter
  • Because molecules are heavier
  • Because molecules have less energy

    • What is the function of a catalyst in a chemical reaction?

    <p>To decrease the activation energy</p> Signup and view all the answers

    According to the collision theory, what determines the rate of a chemical reaction?

    <p>Frequency of collisions</p> Signup and view all the answers

    What happens when the concentration of one or more reactants increases?

    <p>The rate of the reaction increases</p> Signup and view all the answers

    What is a major reason why reactions may have different rates under the same conditions?

    <p>The identity of the reactants is different.</p> Signup and view all the answers

    What is the primary function of a catalyst in a chemical reaction?

    <p>To lower the activation energy</p> Signup and view all the answers

    Why does food spoil more quickly at room temperature than in a refrigerator?

    <p>Because the rate of chemical reactions increases at higher temperatures</p> Signup and view all the answers

    What is the primary condition necessary for a chemical reaction to occur, according to collision theory?

    <p>The reacting particles must collide with each other</p> Signup and view all the answers

    What is an effect of increasing the surface area of contact between reactants?

    <p>The rate of the reaction increases</p> Signup and view all the answers

    What is a characteristic of homogeneous and heterogeneous reactions?

    <p>They are classified based on the phase of the reactants</p> Signup and view all the answers

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