Andhra University 2008 B.E pHYSICAL CHEMISTRY - Question Paper

I Year B.E./B.Tech Degree exams
pHYSICAL CHEMISTRY

(Chemical Engineering)

Time : 3 hours Maximum : 75 Marks

ques. one is compulsory

ans any 4 from ques. two to 8

All ques. carry marks

18

4. a) discuss how the molecular weight of a non-volatile solute

can be determined by using any 1 of the colligative

properties? eight Marks

b) State and discuss distribution law? elaborate its limitations?

provide any 2 important applications? seven Marks

5. a) State 1st legal regulations of Thermodynamies? describe the terms Heat

capacity and Heat content of a system? discuss the terms

Heat of reaction and Heat of formation? eight Marks

b) discuss the meaning of Equilibrium Constant of a Chemical

Reaction? Show that Kp=Ke for the equilibrium H2-I2-2HI

7 Marks

6. a) describe single electrode potential? How is it determined? provide

examples? discuss the terms decomposition potential and

over voltage? nine Marks

b) Differentiate ranging from Galvanic and electrolytic cells? provide

example six Marks

7. a) State Phase rule and discuss the terms involved with suitable

examples eight Marks

b) Draw the Phase diagram and explain the application of Phase

rule to a 1 component system ice/water/vapour?

7 Marks

8. a) discuss the terms Rate constant, Order of a reaction and

Molecularity of a reaction? provide 2 examples of 1st order

and 2nd order reactions? eight Marks

b) Write a note on various kinds and characteristics of a

catalyst? What is Enzyme catalysis? seven Marks

19

Q.1 five x three = 15 Marks

a) Draw the Stress Vs Strain curve for mild steel

b) What is Mohr’s circle? Where is it used?


c) discuss the various kinds of beams with suitable illustrations

d) Write the expressions for strain in terms of stress in 2-

Dimensions

e) Write expression for the deflection (elongation) of a closed

coil helical spring subjected to an axial load P.

Q.2

a) 2 solid cylindrical rods AB and BC are welded together

at B and loaded as shown. If the avg. normal stress must

not exceed 1450 MPa in either rod, determine the smallest

allowable values of d1 and d2. (7 marks)

I Year B.E./B.Tech Degree exams

Earning:   Approval pending.