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Chemical Kinetics and Reaction Mechanisms Quiz

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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?

New bonds must form Signup and view all the answers

What does the Maxwell-Boltzmann distribution describe?

Distribution of molecular speeds at different temperatures Signup and view all the answers

Which type of reaction depends on the heat of reaction?

Exothermic reactions Signup and view all the answers

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

The distribution becomes broader as temperature increases Signup and view all the answers

What does the Arrhenius equation relate to the reaction rate?

Temperature and activation energy Signup and view all the answers

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

It represents the difference in potential energy between the activated complex and the reactants Signup and view all the answers

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

It is the transition state that must be reached for the reaction to proceed Signup and view all the answers