LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – CHEMISTRY

FIFTH SEMESTER – APRIL 2012

CH 5507 – PHASE EQUILIBRIA AND KINETICS

 

 

 

Date : 30-04-2012              Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

 

PART – A

 

Answer ALL questions:                                                                                      (10 x 2 = 20 marks)

 

1. Define congruent melting point.
2. State phase rule and mention the terms involved in it.
3. What are isotonic solutions?
4. What do you mean by abnormal Colligative properties?
5. What are zero order reactions? Give an example.
6. Bring out the differences between order and molecularity of a reaction.
7. State the steps that are involved in the thermal docomposition of acetaldehyde.
8. Explain how ionic strength affects the rate of a reaction in solution.
9. What is heterogenous catalysis?
10. Define the term Adsorption.

PART – B

Answer any EIGHT questions:                                                                           (8 x 5 = 40 marks)

 

11. Apply phase rule to water system. Draw the phase diagram of it.
12. Explain phase rule to lead-silver system and discuss the desilverisation of lead from this

system.

13. State and explain Raoult’s law.
14. The molar heat of vaporization of water at 100^oC is 40.585 kJ mol^-1. At what temperature

will a solution containing 5.60 g of glucose per 1000 g of water boil?

15. What are azeotropes? Explain.
16. Derive the expression for the rate constant for the reaction 2A -> products.
17. Calculate the activation energy of a reaction whose rate constant is tripled by a 10^oC rise in

temperature  from the initial temperature of 27^oC.

18. Explain the kinetics of parallel reaction with one example.
19. Explain the theory of absolute reaction rate and show how it is superior to other theories.
20. Explain the kinetics of acid catalysed ester hydrolysis.
21. State and explain the factors that affect the rate of enzyme catalysis.
22. What are Wilkinson’s catalysts? Explain its catalytic action in reactions.

PART – C

Answer any FOUR questions:                                                                          (4 x 10 = 40 marks)

 

23. Draw and explain the phase diagram of FeCl₃-H₂O system.

 

24. (a) Derive Clausius-Clapeyron equation and state any one of its applications.

(b) Explain partially miscible binary systems with suitable examples.

 

25. (a) Derive Nernst distribution law and state its limitations.

(b) Discuss on steam distillation.

 

26. (a) Explain the differential method of determination of order of a reaction.

(b) Explain the effect of solvent on the rate on S_N2 reaction.

 

27. (a) Explain Lindemann’s steady state principle.

(b) State the postulates of Langmuir’s adsorption equation and derive the equation.

 

28. Discuss the kinetics of enzyme catalysis with Michaelis – Menton mechanism. How are the

rate constants evaluated?

 

 

 

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