UNIVERSITY OF MADRAS
B.Sc. DEGREE COURSE IN CHEMISTRY
SEMESTER SYSTEM WITH CREDITS
(Effective from the Academic Year 2003-2004)

Semester V

Semester V - Paper VII - Physical Chemistry-I

Duration: 3 hrs
Maximum Marks: 100
Credits: 4

(60 hrs)

Unit - I

(30 hrs)

1.1 Solutions - Solutions of gases in liquids - Henrys law - solution of liquids in liquids. Raoult's law. Binary liquid mixtures - ideal solutions - deviations from ideal behaviour - vapour pressure - composition and vapour pressure - temperature curves - azeotropic distillation.

1.2 Clapeyron - Clausius euation - derivation and uses - thermodynamic derivation of elevation of boiling point and depression of freezing point - calculation of molecular weights.

1.3 Distribution law - Thermodynamic derivation and applications.

1.4 Phase equilibria - Gibb's phase rule - statement and definition of terms - Application to one component systems - water and sulphur - thermal analysis and cooling curves - reduced phase rule - two component systems - lead - silver system - freezing mixtures - Two component systems - compound formation with congruent melting point -Zn-mg system, Ferric chloride - water system - incongruent melting point Na-K system - CST and effect of impurities on CST.

Unit - II

(10 hrs)

2.1 Adsorption - Physisorption and chemi sorption - Freundlich adsorption isotherm - Langmuir adsorption isotherm - BET equation (no derivation) - applications of adsorption.

2.2 Catalysis: - definition - homogeneous catalysis - function of a catalyst in terms of Gibb's free energy of activation, heterogeneous catalysis - kinetics of unimolecular surface reactions.

Unit - III (20 Hrs)

3.1 Chemical kinetics - Definition of order and molecularity - methods to determine the rate of reactions - derivation of rate constants for I, II, III and Zero order reactions and examples - derivation for time for half change with examples - methods to determine the order of reactions - effect of temperature on the rate of reactions - Arrehenius equation and concept of energy of activation.

3.2 Collision theory and derivation of rate constant for bimolecular reactions - theory of absolute reaction rates - thermodynamic derivation for the rate constant for a bimolecular reaction from it - Comparison of collision theory and ARRT - significance of entropy and free energy of activation - consecutive, parallel and reversible reactions (no derivations, only examples).

Reference Books:

Physical Chemistry:

1. Principles of physical chemistry - B.R. Pun and Sharma - Shobanlal Nagin Chand & Co.,
2. Text l3ook of physical chemistry - P.L. Soni Sultan Chand.
3. Physical chemistry - Negi and Anand - New Age.
4. Physical chemistry - Kundu and Jam - S.Chand.
5. Physical chemistry - K.L. Kapoor - Macmillan - 4 volumes.
6. Elements of physical chemistry - Glasstone and Lewis - Macmillan.
7. Text book of physical chemistry - S.Glasstone, Macmillan.
8. Fundamentals of physical chemistry Maron and Landor-Colier - Macmillan.
9. Physical chemistry - G.W.Castellan -- Narosa publishing house.
10. Physical chemistry - WaIter J.Moore-Urient Longman. 11. Numerical problems on physical chemistry Gashal, Books and Allied (P) Ltd.,
12. Universal General Chemistry, C.N.R. Rao, Macmillan.