Chemical Kinetics and Reaction Mechanisms Quiz

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Questions and Answers

What is the minimum energy required to cause a reaction to occur?

  • Free energy
  • Activation energy (correct)
  • Potential energy
  • Heat of reaction

What is an activated complex in the context of chemical kinetics?

  • A stable state before the reaction starts
  • A state with minimum potential energy
  • An intermediate state formed during the conversion of reactants into products (correct)
  • A state with maximum potential energy

Which equation can be used to calculate the activation energy?

  • van 't Hoff equation: $ln(K_2/K_1) = -rac{ riangle H}{R}(1/T_2 - 1/T_1)$
  • Gibbs free energy change: $ riangle G = riangle H - T riangle S$
  • Arrhenius equation: $k = A e^{-E_a/RT}$ (correct)
  • Maxwell-Boltzmann distribution: $f(v) = 4 ext{ }eta v^2 e^{-eta mv^2/2kT}$

What must happen for a reaction to proceed according to the text?

<p>New bonds must form (D)</p> Signup and view all the answers

What does the Maxwell-Boltzmann distribution describe?

<p>Distribution of molecular speeds at different temperatures (D)</p> Signup and view all the answers

Which type of reaction depends on the heat of reaction?

<p>Exothermic reactions (C)</p> Signup and view all the answers

What is the relationship between the Maxwell-Boltzmann distribution and temperature?

<p>The distribution becomes broader as temperature increases (A)</p> Signup and view all the answers

What does the Arrhenius equation relate to the reaction rate?

<p>Temperature and activation energy (C)</p> Signup and view all the answers

How is the activation energy related to the potential energies in an energy diagram?

<p>It represents the difference in potential energy between the activated complex and the reactants (D)</p> Signup and view all the answers

What is the significance of the activated complex in a chemical reaction?

<p>It is the transition state that must be reached for the reaction to proceed (C)</p> Signup and view all the answers

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