Anna University Chennai 2006 B.E CHEMISTRY - 1 - Question Paper

B.E./B.Tech. DEGREE EXAMINATION, JANUARY 2006.
First Semester
CY 1101 - CHEMISTRY - 1
(Common to all branches other than marine Engineering)
(Regulation 2004)
Time: 3Hours Maximum: 100 Marks
ans ALL ques.

PART A - [10 X two = 20MARKS]

1. discuss briefly any 1 application of Kohlrausch legal regulations of Independent migration of ions.

2. What is a secondary reference electrode? provide 1 example with its electrode potential value?

3. What do you mean by state functions? provide example.

4. Predict the conditions for spontaneity in terms of entropy and free energy.

5. What is catalytic poisoning? provide 1 example.

6. Briefly discuss chemisorption with an example.

7. Write the general formula for the rate constant of a 2nd order reaction, A + B ---> products, where the initial concentrations of A and B are various. Write its unit also.

8. What is meant by activation energy of a reaction?

9. What happens to a molecule when it is irradiated with
(a) IR light
(b) Microwave radiation.

10. Mention the factors that influence the intensity of spectral lines.

PART B - [5 X 16 = 80 MARKS]

11. (i) What is the difference ranging from order and molecularity of reactions? [3 MARKS]

(ii) elaborate the characteristics of a 2nd order reaction? [5 MARKS]

(iii) A 1st order reaction has a k value of 4.5 X 10^3 at 1decgreeC and an activation energy of 58kJmol^-1. At what temperature would k be 1.00 X 10^4 S^-1.

12. (a) (i) discuss the terms: intensive and extensive properties with example. [3 MARKS]

(ii) What is the significance of Gibbs-Helmholtz equation? [5 MARKS]

(iii) Derive Maxwell's relations from the fundamental definitions of thermodynamic properties.

[OR]

(b) (i) Show that Cp - Cv = R. [3 MARKS]

(ii) At 373.6K and 372.6K, the vapour pressures of water are 1.018 and 0.982 atm respectively. What is the heat of vaporization of water? [5 MARKS]

(iii) Derive the relation to obtain the change in entropy of an ideal gas when it is expanded reversibly.
[8 MARKS]

Earning:   Approval pending.