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REACTION KINETICS

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REACTION KINETICS (Level 2, 3 CU)

a. Brief Course Description

Review of integrated rate laws for first, second, third and general order reactions. Kinetically, more complex reactions are also is considered with the instructions of the steady-state approximation to simplify such analysis.

b. Course Objectives

At the end of the course, the student is expected to:

• Explain and account for the experimental techniques used in following the rates of chemical reactions

• Analyze such kinetic data

• Evaluate the observed rate laws

• Formulate plausible mechanisms of such reactions

c. Detailed Course Description. (30 hrs)

- Rate equations for second and third order reactions

- Determination of reaction order: initial rate, half-life, isolation, and integrated equation methods

- Experimental methods; steady state approximation

- Examples of zero order, 1st , 2nd and 3rd order reactions in gas and solution phases

- Kinetics of opposing, consecutive and parallel reactions

- Fractional order reactions. Energy of activation, the Arrhenius equation

- Introduction to theories of gas-phase reactions: collision theory, transition state theory and unimolecular reactions theory

- Introduction to reactions in solution and homogeneous acid-based catalyst

- Reactions in solutions: effect of solvent and ionic strength

- Homogeneous acid –base catalysis, heterogeneous catalysis and enzyme reactions

- Chain reactions: General introduction, explosion limits

- Free radicals: production, detection, general applications

- Photochemical reactions: general principles, laws, fluorescence, phosphorescence, chemiluminescence, excited state, Flash photolysis

- Hydrogen chloride reaction: detailed treatment with comparison to thermoreaction. Photosensitization, photosynthesis

- More advanced treatment and comparison of collision and transition state theories. Potential energy surfaces. Free energy, enthalpy, and entropy of activation

- Use of kinetic methods for investigating reaction mechanisms, illustrated by specific examples

- Chain reactions: further detailed studies of selected examples, such as hydrogen-halogen, hydrogen-oxygen, etc.

- Treatment of fast reactions, stop-flow and relaxation methods. Reactions in flow systems and in molecular beams.

- Use of modern instrumental methods in chemical kinetics.

d. Mode of Delivery: Lectures, tutorials and assignments

Assessment: Tests and assignments (30%), Examination (70%)

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