Download GTU BE/B.Tech 2019 Winter 3rd Sem New 3132105 Materials Thermodynamics Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Winter 3rd Sem New 3132105 Materials Thermodynamics Previous Question Paper

1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ? III (New) EXAMINATION ? WINTER 2019
Subject Code: 3132105 Date: 30/11/2019

Subject Name: Materials Thermodynamics
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:

1. Attempt all questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.



Marks

Q.1 (a) Define system and give example. 03
(b) Classify system and explain with suitable example. 04
(c) Derive combined equation of 1
st
and 2
nd
law of
thermodynamics in terms of internal energy, enthalpy
and free energy.
07

Q.2 (a) Which equation rules the state of system? State it. 03
(b) Compare extensive and intensive properties. 04
(c) Apply Hess law and importance with suitable example. 07
OR
(c) State 1
st
law of thermodynamics give its significance.
Explain concept proposed by it.
07
Q.3 (a) Based on which law temperature measuring equipment
are designed? State it.
03
(b) Prove that Cp>Cv. 04
(c) Interpret Kirchoff?s law and importance with suitable
example.
07
OR
Q.3 (a) Define Specific Heat (C). 03
(b) Define Cp and Cv. 04
(c) Derive relationship Cp ? Cv = R. 07
Q.4 (a) Identify enthalpy (H) and Heat (q). 03
(b) What is equilibrium? Explain different equilibrium. 04
(c) What is concept of free energy? Relate different type of
free energy.
07
OR
Q.4 (a) Interpret activity and fugacity. 03
(b) Examine possibility to pass on heat from lower
temperature to higher temperature. Defend your
answer.
04
(c) Contrast Raoult?s, Henry?s and Sievert?s law. 07
Q.5 (a) What is solution and ideal solution? 03
(b) Explain concept of entropy and 3
rd
law of
thermodynamics.
04
(c) Demonstrate use of Ellingham diagram in metallurgy
and discuss important characteristics.
07
OR
Q.5 (a) Calculate free energy change at 500 K for following
reaction: CuO (s) + H2 (g) ? Cu (s) +H2O (g) ?H
0
500=
-87 kJ/mol and ?S
0
500= 47 J/K/mol.
03
FirstRanker.com - FirstRanker's Choice
1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ? III (New) EXAMINATION ? WINTER 2019
Subject Code: 3132105 Date: 30/11/2019

Subject Name: Materials Thermodynamics
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:

1. Attempt all questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.



Marks

Q.1 (a) Define system and give example. 03
(b) Classify system and explain with suitable example. 04
(c) Derive combined equation of 1
st
and 2
nd
law of
thermodynamics in terms of internal energy, enthalpy
and free energy.
07

Q.2 (a) Which equation rules the state of system? State it. 03
(b) Compare extensive and intensive properties. 04
(c) Apply Hess law and importance with suitable example. 07
OR
(c) State 1
st
law of thermodynamics give its significance.
Explain concept proposed by it.
07
Q.3 (a) Based on which law temperature measuring equipment
are designed? State it.
03
(b) Prove that Cp>Cv. 04
(c) Interpret Kirchoff?s law and importance with suitable
example.
07
OR
Q.3 (a) Define Specific Heat (C). 03
(b) Define Cp and Cv. 04
(c) Derive relationship Cp ? Cv = R. 07
Q.4 (a) Identify enthalpy (H) and Heat (q). 03
(b) What is equilibrium? Explain different equilibrium. 04
(c) What is concept of free energy? Relate different type of
free energy.
07
OR
Q.4 (a) Interpret activity and fugacity. 03
(b) Examine possibility to pass on heat from lower
temperature to higher temperature. Defend your
answer.
04
(c) Contrast Raoult?s, Henry?s and Sievert?s law. 07
Q.5 (a) What is solution and ideal solution? 03
(b) Explain concept of entropy and 3
rd
law of
thermodynamics.
04
(c) Demonstrate use of Ellingham diagram in metallurgy
and discuss important characteristics.
07
OR
Q.5 (a) Calculate free energy change at 500 K for following
reaction: CuO (s) + H2 (g) ? Cu (s) +H2O (g) ?H
0
500=
-87 kJ/mol and ?S
0
500= 47 J/K/mol.
03
2
(b) Calculate standard enthalpy change for
Cu2S (s) + 2 Cu2O (s) ? 6Cu (l) + SO2 (g) where are

Cu2S
(s)
Cu2O
(s)
Cu (l) SO2 (g)
?H
f
0 1523K
kJ/mol
-86.7 -176.4 0 -278.4

04
(c) Brass contains 70% Cu, 30% Zn with atomic weight
63.54 and 65.38 respectively. Calculate the
composition of brass in atom %. Also calculate the
atom fractions of Cu and Zn in above brass.
07

***************
FirstRanker.com - FirstRanker's Choice