Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 7th Sem New 21726022172607 Polymer Kinetics Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VII(NEW) EXAMINATION ? SUMMER 2019
Subject Code:2172602/2172607 Date:14/05/2019
Subject Name:Polymer Kinetics
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.
Q.1 (a) With suitable example, explain non elementary reaction. 03
(b) Compare collision theory with transition state theory. 04
(c) Discuss in detail about the factors affecting rate of reaction. 07
Q.2 (a) Give the classification of reactor based on it?s operation. 03
(b) Differentiate the molecularity and order of reaction. 04
(c) For gas phase decomposition of azomethane (CH3)2N2 ?C2H6 + N2. The rate expression is
rN2 =k1*C
2
AZO/1+k?*CAZO. Devise mechanism to explain this rate.
07
OR
Q.2 (c) Decomposition of actone dicarboxylic acid is first order reaction CO(CH2COOH)2 ?
CO(CH3)2 +2CO2. Following is data for the same:
T, K 273 293 313 333
K1 (s)
-1
2.46*10
5
47.5*10
5
576*10
5
5480*10
5
Find out the energy of activation for this reaction graphically.
07
Q.3 (a) Explain the term space time with suitable example. Also give it?s unit. 03
(b) Decomposition of gas is second order reaction. When initial concentration of gas is 5*10
-4
mole/liter it is 40% decomposed in 50 minutes. Calculate the value of rate constant.
04
(c) Derive the performance equation of ideal Continuous Stirred Tank Reactor (CSTR) for
first order variable volume system.
07
OR
Q.3 (a) Derive the integral rate equation for n
th
reaction. 03
(b) Explain the term space velocity with suitable example. Also write it?s unit. 04
(c) Derive the performance equation for ideal Plug Flow Reactor (PFR) for first order variable
volume system.
07
Q.4 (a) Explain the term ?chain Modifier?. 03
(b) Write a note on ?Ceiling Temperature?. 04
(c) Discuss the kinetics of the cationic polymerization. 07
OR
Q.4 (a) Define the term ?chain transfer constantan?. List the factors affecting it. 03
(b) What do you mean by ?Mayo Equation?? Give it?s application. 04
(c) Discuss the kinetics of anionic polymerization. 07
Q.5 (a) Explain the term ?telomerization?. 03
(b) Which principles are adopted to achieve the narrow composition distribution in case of
copolymerization.
04
(c) Discuss the viscometry method to determine the molecular weight of polymer. 07
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Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VII(NEW) EXAMINATION ? SUMMER 2019
Subject Code:2172602/2172607 Date:14/05/2019
Subject Name:Polymer Kinetics
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.
Q.1 (a) With suitable example, explain non elementary reaction. 03
(b) Compare collision theory with transition state theory. 04
(c) Discuss in detail about the factors affecting rate of reaction. 07
Q.2 (a) Give the classification of reactor based on it?s operation. 03
(b) Differentiate the molecularity and order of reaction. 04
(c) For gas phase decomposition of azomethane (CH3)2N2 ?C2H6 + N2. The rate expression is
rN2 =k1*C
2
AZO/1+k?*CAZO. Devise mechanism to explain this rate.
07
OR
Q.2 (c) Decomposition of actone dicarboxylic acid is first order reaction CO(CH2COOH)2 ?
CO(CH3)2 +2CO2. Following is data for the same:
T, K 273 293 313 333
K1 (s)
-1
2.46*10
5
47.5*10
5
576*10
5
5480*10
5
Find out the energy of activation for this reaction graphically.
07
Q.3 (a) Explain the term space time with suitable example. Also give it?s unit. 03
(b) Decomposition of gas is second order reaction. When initial concentration of gas is 5*10
-4
mole/liter it is 40% decomposed in 50 minutes. Calculate the value of rate constant.
04
(c) Derive the performance equation of ideal Continuous Stirred Tank Reactor (CSTR) for
first order variable volume system.
07
OR
Q.3 (a) Derive the integral rate equation for n
th
reaction. 03
(b) Explain the term space velocity with suitable example. Also write it?s unit. 04
(c) Derive the performance equation for ideal Plug Flow Reactor (PFR) for first order variable
volume system.
07
Q.4 (a) Explain the term ?chain Modifier?. 03
(b) Write a note on ?Ceiling Temperature?. 04
(c) Discuss the kinetics of the cationic polymerization. 07
OR
Q.4 (a) Define the term ?chain transfer constantan?. List the factors affecting it. 03
(b) What do you mean by ?Mayo Equation?? Give it?s application. 04
(c) Discuss the kinetics of anionic polymerization. 07
Q.5 (a) Explain the term ?telomerization?. 03
(b) Which principles are adopted to achieve the narrow composition distribution in case of
copolymerization.
04
(c) Discuss the viscometry method to determine the molecular weight of polymer. 07
2
OR
Q.5 (a) What do you mean by kinetic chain length? Give it?s relationship with degree of
polymerization.
03
(b) Which conclusions can be drawn regarding to kinetics of free radical polymerization? 04
(c) Discuss the ultracentrifugation method to determine the molecular weight of polymer. 07
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This post was last modified on 20 February 2020