BIOCHEMICAL THERMODYNAMICS Question Papers (REGULAR,2006)

SET : 1

1. Sefine second law of thermodynamics. List alternative statements.

Discuss how limitation of first law disappear in second law of thermodynamics.

2. What is non ideal gas? How is it different from ideal gas? Compare PV datta for ideal and non ideal gas.

Define generalized compressibility factor Z.

3. Prove any two Maxwell relations from forst principle.

4. Discuss the importance of fugacity in thermodynamics.

Discuss fugacity and fugacity coefficient for pure species. (R)

5. Show that when x_i ---> 1 henry’s law is valid for one species in a binary solution, the lewis Randall rule is valid for the other one.

6. Consider a system in which the following reaction occur,

CH₄ + H₂O ----> CO + 3H₂ (1)

CH4 + 2H2O ----> CO₂ + 4H₂ (2)

Where the numbers (1) and (2) indicate the value of is the reaction index if there are present initially 2 mol CH₄ and 3 mol H₂O. determine expressions for the Yi as function of Є₁ and Є₂.

7. Discuss in detail of different metabolic routes to secondary metabolites.

8. Write short notes on :

a) Yield Coefficients

b) Energy source dissimilation

SET : 2

1. A steel casting [Cp = 0.5 KJ/KgK] weighing 40 Kg and at a temperature of 450 C is quenched in 150 Kg of oil [Cp = 2.5KJ/KgK] at 25 C. if there are no heat losses, what is the change in entropy of

a) The casting

b) The oil and

c) Both considered togather

2. What is ideal gas? Name the two basic assumptions, which were made use of in deriving the ideal gas equation of state from kinetic theory arguments.

Define thermodynamic properties, classify the thermodynamic properties. What is the use of such classification.

3. Give an example of a fundamental relation.

What is an equation of state? How many eequations of state are there for a single component of simple compressible substance.(R)

4. Discuss the importance of fugacity in thermodynamics.

Discuss fugacity and fugacity coefficient for pure species.(R)

5. Describe and compare Mar gules, Van Laar and Wilson equations in brief for treating VLE data.

6. What is a Le Chattelier’s Principle? Give suitable examples to explain above principle.

Discuss the effect of inert gas addition on conversion for various situations.(R)

7. Explain the Gaden classification from stoichiometric point of view the product formation in fermentation process.

The following stoichiometric equation describes penicillin synthesis: 1.5 Glucose + H₂SO₄ + 2NH₃ + phenyl acetate penicillin G + CO₂ + 8H₂O the theoretical yield of penicillin is 1.2g (gram of glucose). Find out the molecular weight of penicillin G.(R)

8. Discuss in detail energy source dissimilation.

SET : 3

1. Define any two of the following:

a) Energy

b) Property

c) Work

d) Equilibrium

Differentiate between intensive and extensive properties with suitable examples.(R)

2. Name the methods by which the thermodynamic properties of fluids are usually presented. Discuss any two of them.(R)

3. A particular thermodynamic system has the following equations of state.

1/T = 5NR/2U; P/T = NR/V obtain the third equation of state of the system.(R)

4. Define chemical potential of a chemical in the mixture. Discuss the importance of chemical potential.

Define partial molar property of species in solution. Show that chemical potential and partial molar gibbs energy are identical.

5. Prove the following:

a) f_i ^l = f_i ^sat = Ф_i^satP_i^sat

b) f_i = Ф_i^satP_i^satexp[V_i^l(P-P^sat)/R.T] (R)

6. Consider a system in which the following reaction occur,

CH₄ + H₂O ----> CO + 3H₂ (1)

CH4 + 2H2O ----> CO₂ + 4H₂ (2)

Where the numbers (1) and (2) indicate the value of is the reaction index if there are present initially 2 mol CH₄ and 3 mol H₂O. determine expressions for the Yi as function of Є₁ and Є₂.(R)

7. Explain the relationship between EMP pathway and respiratory chain.

8. Discuss in detail that electrons in the organic substrate is transferred to oxygen.

SET : 4

1. A reversible engine operating between a reservoir at 600K and the ambient atmosphere at 300K drives a refrigerator operating operating between 240K and the ambient atmosphere. Determine the ratio of energy rejected by both the devices to the ambient atmosphere to the energy absorbed by the engine from the reservoir at 600K.(R)

2. Write a short notes on any two of the following :

a) Redlich Kwong (RK)

b) Virial equation of state

c) The compressibility factor method.

3. What is the significance of the second law efficiency?

Define the second law efficiency of a process.

4. Prove the following:

a) V_i^id = V_i

b) H_i^id = H_i

c) V^id = Σx_iV_i

d) H^id =Σ x_iH_i

5. Show that when x_i ---> 1 henry’s law is valid for one species in a binary solution, the lewis Randall rule is valid for the other one.

6. In a particular reactor, which is maintained at 0.1Mpa and 1000K, a stoichiometric mixture of CO and H2O is fed to carry out the water gas shift reaction. Determine the degree of conversion and the composition of the equlibrium mixture, if the equilibrium constant is 2.111.

7. Explain in detail how EMP pathway can be used in five different pathways.

8. Discuss the heat balance in substrate consumption.