Annamalai University Subject Code:09BT229 CHEMICAL THERMODYNAMICS AND BIO THERMODYNAMICS November/ December - 2012 Question paper

University: Annamalai  University
Course: CHEMICAL THERMODYNAMICS AND BIO THERMODYNAMICS
Subject : CHEMICAL THERMODYNAMICS AND BIO THERMODYNAMICS
Year of  Question Paper : November/ December - 2012




Reg. No. ________  
                                            Karunya University

(Karunya Institute of Technology and Sciences)
(Declared as Deemed to be University under Sec.3 of the UGC Act, 1956)

End Semester Examination – November/ December - 2012

Subject Title: CHEMICAL THERMODYNAMICS AND BIO THERMODYNAMICS             Time: 3 hours
Subject Code: 09BT229                    Maximum Marks: 100        
                             
Answer ALL questions
PART – A (10 x 1 = 10 MARKS)

1. Internal energy of an ideal gas depends only on  ______.
2. For ideal gases Cp – Cv =  _______.
3. The ratio of fugacity to pressure is known as ________.
4. The rate of change of chemical potential with pressure is equal to _____.
5. Ethanol-water is an example for ________ azeotrope.
6. Under equilibrium conditions the free energy change is ______.
7. The maximum coefficient of performance is achieved in ____ cycle.
8. The Linde process for gas liquefaction works on the principle of ______.
9. The two functions of NADH are ______.
10. The degree of reduction for the element C is _____.

PART – B (5 x 3 = 15 MARKS)

11. Assuming air to behave as an ideal gas, calculate the molar volume of air at 350 K and 1 bar.
12. Write a note on activity coefficients.
13. Distinguish between bubble point and dew point temperatures.
14. How is entropy change in an irreversible process determined?
15. Define ATP yield coefficient.

PART – C (5 x 15 = 75 MARKS)

16. a. Show that Joule Thomson coefficient is zero for ideal gases.     (7)
      b. Show that Cp – Cv = β2VT/κ       (8)
(OR)
17. Derive the expression for Maxwell’s relation. Add a note on its application.

18. a. Calculate the fugacity of liquid and water at 303 K and 10 bar if the saturation pressure at 303 K is 4.241 kPa and specific volume of liquid water at 303 k is 1.004 X10-3 m3/kg.
b. What is the effect of pressure and temperature on activity.
(OR)
19. a. Define Chemical potential. What is its physical significance? (5)
b. Derive the Gibbs-Duhem equation. (10)

20. Prove that if Raoult’s law is valid for one constituent of a binary mixture over the whole concentration range, it must also apply to the other constituent.
(OR)
21. Derive the Van’t Hoff equation.
(OR)
22. Explain the Rankine cycle with a neat diagram. Add a note on its application.
(OR)
23. a. Hydrocarbon oil is to be cooled from 425 K to 340 K at a rate of 5000 kg/h in a parallel flow heat exchanger. Cooling water at a rate of 10,000 kg/h at 295 K is available. The mean specific heats of the oil and water are 2.5 KJ/kg K and 4.2 KJ/kg K respectively. Determine the total change in Entropy. Is the process reversible? (10)
b. What is the use of Liquefaction processes? (5)

24. a. Describe briefly about the functions of ATP and NADH in the metabolic pathway. (7)
b. Write a note on oxygen consumption and heat evolution in aerobic cultures. (8)
(OR)
25. a. Estimate the theoretical growth and product yield coefficients for ethanol fermentation by S.cerevisiae as described by the following overall reaction.
C6H12O6  → 2 C2H5OH + 2 CO2   (10)
b. Discuss briefly about the elemental balance used in Stoichiometric calculations. (5) ... ..

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