Chemical Kinetics Rate Law Determination Quiz
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Questions and Answers

What is the overall order of the given reaction?

  • Third order (correct)
  • Second order
  • Fourth order
  • First order
  • If the concentration of Y is halved, what effect will it have on the rate of the reaction?

  • The rate will remain the same
  • The rate will be halved
  • The rate will quadruple (correct)
  • The rate will double
  • What is the unit of the rate constant k for the reaction in mol-2dm6s-1?

  • mol-2dm3s-1
  • mol-1dm6s-1
  • mol-3dm6s-1 (correct)
  • mol-4dm6s-1
  • What does increasing the temperature do to the rate constant k according to the Arrhenius equation?

    <p>Increases it</p> Signup and view all the answers

    If the activation energy (EA) for a reaction increases, what would be the effect on the rate constant k?

    <p>Decrease</p> Signup and view all the answers

    Which equation represents the relationship between ln k, ln A, EA, R, and T according to the Arrhenius equation?

    <p>ln k = ln A - EA/RT</p> Signup and view all the answers

    What is the overall order of the reaction described in the text?

    <p>3rd order</p> Signup and view all the answers

    If both [A] and [B] concentrations are doubled simultaneously in a reaction with rate equation r = k [A] [B]^2, how does the rate change?

    <p>It increases 18 times</p> Signup and view all the answers

    Given the initial rate data in the table, what is the order with respect to reactant X?

    <p>1st order</p> Signup and view all the answers

    If the concentration of reactant Y is tripled while the concentration of X remains constant, what would be the impact on the rate in the reaction described?

    <p>The rate would increase by a factor of 9</p> Signup and view all the answers

    What is the unit of the rate constant in the reaction described?

    <p>mol-2dm6s-1</p> Signup and view all the answers

    If both reactant concentrations are changed simultaneously, how does the effect on rate change compared to changing just one reactant's concentration at a time?

    <p>The effect on rate is multiplied together</p> Signup and view all the answers

    In a first-order reaction, what is the relationship between the rate constant (k) and concentration?

    <p>k is independent of concentration</p> Signup and view all the answers

    What order is a reaction if the half-lives of the reaction rapidly increase as the reaction progresses?

    <p>Second order</p> Signup and view all the answers

    How do you determine the overall order of a reaction from initial rate data?

    <p>By calculating the sum of exponents in the rate equation</p> Signup and view all the answers

    What happens to the rate in a zero-order reaction as the reactant is used up?

    <p>The rate remains constant</p> Signup and view all the answers

    What is the unit of rate constant (k) for a first-order reaction?

    <p>$s^{-1}$</p> Signup and view all the answers

    How does the half-life of a first-order reaction change with concentration?

    <p>It remains constant with concentration</p> Signup and view all the answers

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