Learn
Games
Blogs
Module 5: Chemical Kinetics

Chemical kinetics examines the dynamics of chemical change, focusing on how fast reactions occur and the factors influencing their speed. It encompasses collision theory that explains reaction prerequisites, the mathematical expressions for reaction rates, and the concept of reaction mechanisms with the rate-determining step. The Arrhenius equation further provides insights into how temperature and activation energy impact reaction rates, essential for both theoretical understanding and practical applications in various fields.

You've not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take mock test.

Sections

  • 5

    Chemical Kinetics

    Chemical kinetics studies the rates of chemical reactions and the factors that influence them.

    Learning Practice

  • 5.1

    The Dynamics Of Reaction: Collision Theory And Influencing Factors

    This section discusses the foundational Collision Theory and various factors that influence the rates of chemical reactions.

    Learning Practice

  • 5.1.1

    Particles Must Collide

    Collision theory explains the conditions required for reactant particles to collide and react.

    Learning Practice

  • 5.1.2

    Collisions Must Have Sufficient Energy (Activation Energy)

    The section explores the concept of activation energy in collision theory, emphasizing the significance of sufficient energy for reactant collisions to lead to successful chemical reactions.

    Learning Practice

  • 5.1.3

    Collisions Must Have The Correct Orientation

    Successful chemical reactions require that particles collide with sufficient energy and correct orientation.

    Learning Practice

  • 5.2

    Quantifying Rate: Rate Expressions And Rate Constants

    This section discusses the mathematical framework used to express and quantify chemical reaction rates through rate expressions and constants.

    Learning Practice

  • 5.2.1

    Rate

    Chemical kinetics focuses on the speed of chemical reactions and the factors influencing their rates.

    Learning Practice

  • 5.2.2

    K (The Rate Constant)

    The rate constant (k) relates the reaction rate to the concentrations of reactants, providing insight into how reaction rates are influenced by various factors.

    Learning Practice

  • 5.2.3

    [A] And [B]: Concentrations Of Reactants

    This section explores how the concentration of reactants affects the rate of chemical reactions, detailing the principles behind collision theory and their implications.

    Learning Practice

  • 5.2.4

    M And N (Orders Of Reaction)

    This section focuses on the concept of reaction orders (m and n) in chemical kinetics, detailing how they influence the rate law of chemical reactions.

    Learning Practice

  • 5.3

    Determining Reaction Order: The Experimental Approach

    This section outlines how to experimentally determine reaction order using techniques like the initial rates method, emphasizing the practical application of rate laws.

    Learning Practice

  • 5.3.1

    The Strategy For The Initial Rates Method

    The initial rates method is a systematic experimental approach used to determine the order of a reaction concerning its reactants by measuring how the initial reaction rate changes with varying concentrations.

    Learning Practice

  • 5.3.1.1

    Design A Series Of Experiments

    This section outlines a systematic approach for designing experiments to determine the order of reactions using initial rates.

    Learning Practice

  • 5.3.1.2

    Measure Initial Rates

    This section outlines the importance of measuring initial rates of chemical reactions to determine reaction order and how initial concentrations affect reaction speed.

    Learning Practice

  • 5.3.1.3

    Compare Pairs Of Experiments

    This section emphasizes the importance of comparing pairs of experiments in determining the order of reaction with respect to reactants.

    Learning Practice

  • 5.3.1.4

    Deduce The Order For Each Reactant

    This section outlines the experimental approach for determining the reaction order for each reactant involved in a chemical reaction.

    Learning Practice

  • 5.4

    Worked Example

    This section provides a worked example illustrating how to determine the rate expression and rate constant for a hypothetical chemical reaction using experimental data.

    Learning Practice

  • 5.5

    Hl: Unveiling The Pathway: Reaction Mechanisms And The Rate Determining Step

    This section explores the concept of reaction mechanisms and the rate-determining step within multi-step reactions, highlighting their significance in understanding reaction rates.

    Learning Practice

  • 5.5.1

    Elementary Steps

    This section explores the fundamental principles of chemical kinetics, focusing on how reaction rates are determined, the collision theory, and the role of molecular interactions in chemical reactions.

    Learning Practice

  • 5.5.2

    Intermediates

    The section on intermediates discusses transient species formed during multi-step reaction mechanisms, highlighting their significance in determining reaction pathways and rate-determining steps.

    Learning Practice

  • 5.5.3

    Molecularity

    Molecularity describes the number of reactant particles involved in an elementary reaction process.

    Learning Practice

  • 5.5.4

    The Rate Determining Step (Rds): The Bottleneck Of The Reaction

    The rate-determining step is the slowest elementary step in a multi-step reaction mechanism that limits the overall reaction rate.

    Learning Practice

  • 5.5.5

    Connecting Mechanism To The Rate Expression

    This section discusses how the rate expression of a chemical reaction is connected to its mechanism, particularly emphasizing the rate-determining step and the role of intermediates.

    Learning Practice

  • 5.6

    Hl: The Temperature Dependence Of Rate: The Arrhenius Equation And Activation Energy

    The Arrhenius equation quantitatively describes how the rate constant of a reaction varies with temperature and activation energy.

    Learning Practice

  • 5.6.1

    Understanding The Relationship Within The Arrhenius Equation

    The Arrhenius equation quantitatively relates reaction rates to temperature and activation energy, highlighting their significance in chemical kinetics.

    Learning Practice

  • 5.6.2

    Graphical Determination Of Activation Energy

    This section explores the graphical method for determining the activation energy of chemical reactions using the Arrhenius equation.

    Learning Practice

  • 5.6.3

    Worked Example

    This section presents a worked example for determining the rate expression and rate constant for a chemical reaction based on experimental data.

    Learning Practice

References

Untitled document (23).pdf

Class Notes

Memorization

What we have learnt

  • Chemical kinetics explores ...
  • Reaction speed is affected ...
  • The rate expression quantit...

Final Test

Revision Tests

Chapter FAQs