Module Details

The information contained in this module specification was correct at the time of publication but may be subject to change, either during the session because of unforeseen circumstances, or following review of the module at the end of the session. Queries about the module should be directed to the member of staff with responsibility for the module.
Title Physical Chemistry IIA
Code CHEM261
Coordinator Dr G Sedghi
Year CATS Level Semester CATS Value
Session 2019-20 Level 5 FHEQ First Semester 7.5

Pre-requisites before taking this module (or general academic requirements):



• To explain the application of the 1st and 2nd laws of thermodynamics to chemical reactions.

• To reinforce the basic ideas on factors affecting the rates of chemical reactions and quantify the kinetics.

Learning Outcomes

(LO1) Discuss the difference between ideal and real gases.

(LO2) Discuss the 1st and 2nd laws of thermodynamics in the context of chemical reactions.

(LO3) Carry out thermochemical calculations involving enthalpy, entropy and Gibbs free energy.

(LO4) Calculateequilibrium constants from thermodynamic data

(LO5) Discuss the concept of the chemical potential and its application under ideal and non-ideal conditions.

(LO6) Analyse experimental data for the determination of reaction orders and rate coefficients, using appropriate methods depending on the type of data available

(LO7) Deriveand apply rate equations and integrated rate equations for 0th, 1st and 2ndorder reactions.

(LO8) Show an understanding of activation barriers and apply the Arrhenius equation.

(LO9) Describe qualitatively and quantitatively the kinetics of simple parallel, consecutive, and equilibration reactions.

(LO10) Apply the pre-equilibrium and steady state approximations.

(LO11) Describe different decay processes of photoexcited states and analyse their kinetics  quantitatively.

(LO12) Use mathematical procedures and graphs for quantitative data analysis and problem solving.

(LO13) Present and discuss the solution to problems in a small-group environment.

(S1) Critical thinking and problem solving - Critical analysis

(S2) Critical thinking and problem solving - Problem identification

(S3) Numeracy/computational skills - Reason with numbers/mathematical concepts

(S4) Numeracy/computational skills - Confidence/competence in measuring and using numbers

(S5) Numeracy/computational skills - Problem solving

(S6) Numeracy/computational skills - Numerical methods

Teaching and Learning Strategies

This module consists of 18 lectures (50 minutes). The material presented at the lectures and its application for solving problems is supported by three 1-hour tutorials. Students are expected to prepare the answers to tutorial problem questions before the tutorials, discuss them during the tutorials and submit answers to assignment problem questions after each tutorial.




1. Revision of material in Chem152: Ideal gas equation, standard states, first law of thermodynamics, heat & work, enthalpy, Hess'' law cycles, entropy, Gibbs energy, equilibrium constant. Examples of calculations using tables of thermodynamic data.
2. Heat capacity at constant volume or pressure, temperature dependence of internal energy and enthalpy.
3. Second law of thermodynamics, statistical description of entropy. Dependence of entropy on temperature and pressure, third law of thermodynamics.
4. Gibbs free energy, changes at constant temperature or pressure. Equilibrium constant K, relation to Gibbs free energy, variation with temperature and pressure, relation to mole fraction.
5. Chemical potential, equilibrium and the extent of reaction. Effect of temperature and pressure on equilibria. Extension from gas phase reactions to all reactions.
6. Real gases, deviations from ideal behaviour, virial and van der Waals equations of state.
7. Ideal liquids and solutions. Raoult''s law. The chemical potential of components in ideal mixtures: standard and reference states. Colligative properties. Deviations from ideality.
8. Phase transition of pure substances and mixtures; enthalpy and entropy change upon phase transition; phase diagrams.


1. Revision of material in Chem152: Chemical reaction rates, rate equation, reaction orders, integrated rate equations, half life, activation energy barriers and Arrhenius equation.
2. Derivation of zero-, first- and second order integrated rate eqns. Determination of reaction order and rate constant: straight plots. Half-life time of a reaction.
3. Kinetic gas model, collision rates. Simple collision theory (SCT). Potential energy barriers. Reactive Encounters. Comparison of SCT with experimental results. Steric hindrance. Transition state. TransitionState Theory.
4. Consecutive reactions. The rate determining step.
5. Parallel reactions. Reverse reaction and relaxation towards equilibrium.
6. Pre-equilibrium; steady state approximation. Diffusion-controlled reactions.
Michaelis-Menten Mechanism. Lindemann-Hinshelwood mechanism. Chain reactions.

Recommended Texts

Reading lists are managed at Click here to access the reading lists for this module.

Teaching Schedule

  Lectures Seminars Tutorials Lab Practicals Fieldwork Placement Other TOTAL
Study Hours 18


Timetable (if known)              
Private Study 54


EXAM Duration Timing
% of
Penalty for late
formal examination  90 minutes    80       
CONTINUOUS Duration Timing
% of
Penalty for late
Tutorials and assignments Standard UoL penalties apply for late submission. There is no re-submission opportunity. These assignments are not marked anonymously.  3 sets    20