Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 7th Sem New 2173612 Fundamentals Of Reaction Engineering Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VII(NEW) EXAMINATION ? SUMMER 2019
Subject Code:2173612 Date:18/05/2019
Subject Name:Fundamentals of Reaction Engineering
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) Differentiate order and molecularity of a reaction. 03
(b) What are the different ways in which rate of reaction is defined for a
homogeneous system?
04
(c) Explain about various theories predicting temperature dependency for rate of
a chemical reaction.
07
Q.2 (a) On doubling the concentration of reactant rate of reaction triples. Estimate
order of reaction
03
(b) What is a constant volume batch reactor 04
(c) Describe differential method of data analysis. 07
OR
(c) At 500 K the rate of a bimolecular react ion is ten times the rate at 400 K. Find
the activation energy of this react ion using Arrhenius law and Collision
theory.
07
Q.3 (a) What is half life? Derive integrated form of rate expression for rate constant
interms of half life time for first order reactions.
03
(b) Decomposition of a gas is of second order when initial concentration of gas is
5 x 10
-4
mol/l, it is decomposed 40% in 50 min. Calculate the value of rate
constant.
04
(c) Derive integrated form of rate expression for second order reaction of form
2A? products, where total volume of reaction system varies linearly with
conversion.
07
OR
Q.3 (a) Differentiate Space time, holding time and residence time. 03
(b) In case of first order reaction, show that time required for 75% conversion is
double the time required for 50% conversion.
04
(c) Derive the performance equation of a steady state plug flow reactor. 07
Q.4 (a) Mention the physical significance to Damkohler number. 03
(b) Consider a gaseous feed CA = 100, CB0 = 200 enters an isothermal flow reactor.
For XA = 0.8, find CA, CB and XB
04
(c) A homogeneous second order liquid phase reaction is carried out in a mixed
flow reactor. What will be conversion if this reactor is replaced by another
mixed flow reactor having volume 6 times that of original reactor all else
remain unchanged.
07
OR
Q.4 (a) How selectivity is defined for systems batch and flow systems? 03
(b) Discuss regarding qualitative product distribution for reactions in parallel. 04
(c) How performance of mixed flow reactors and plug flow reactors can be
generalized for a n
th
order reactions?
07
Q.5 (a) Define standard heat of reaction and combustion. 03
(b) What is equilibrium conversion? How is it related to equilibrium constant and
temperature for case of a first order reversible reaction?
04
FirstRanker.com - FirstRanker's Choice
1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VII(NEW) EXAMINATION ? SUMMER 2019
Subject Code:2173612 Date:18/05/2019
Subject Name:Fundamentals of Reaction Engineering
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) Differentiate order and molecularity of a reaction. 03
(b) What are the different ways in which rate of reaction is defined for a
homogeneous system?
04
(c) Explain about various theories predicting temperature dependency for rate of
a chemical reaction.
07
Q.2 (a) On doubling the concentration of reactant rate of reaction triples. Estimate
order of reaction
03
(b) What is a constant volume batch reactor 04
(c) Describe differential method of data analysis. 07
OR
(c) At 500 K the rate of a bimolecular react ion is ten times the rate at 400 K. Find
the activation energy of this react ion using Arrhenius law and Collision
theory.
07
Q.3 (a) What is half life? Derive integrated form of rate expression for rate constant
interms of half life time for first order reactions.
03
(b) Decomposition of a gas is of second order when initial concentration of gas is
5 x 10
-4
mol/l, it is decomposed 40% in 50 min. Calculate the value of rate
constant.
04
(c) Derive integrated form of rate expression for second order reaction of form
2A? products, where total volume of reaction system varies linearly with
conversion.
07
OR
Q.3 (a) Differentiate Space time, holding time and residence time. 03
(b) In case of first order reaction, show that time required for 75% conversion is
double the time required for 50% conversion.
04
(c) Derive the performance equation of a steady state plug flow reactor. 07
Q.4 (a) Mention the physical significance to Damkohler number. 03
(b) Consider a gaseous feed CA = 100, CB0 = 200 enters an isothermal flow reactor.
For XA = 0.8, find CA, CB and XB
04
(c) A homogeneous second order liquid phase reaction is carried out in a mixed
flow reactor. What will be conversion if this reactor is replaced by another
mixed flow reactor having volume 6 times that of original reactor all else
remain unchanged.
07
OR
Q.4 (a) How selectivity is defined for systems batch and flow systems? 03
(b) Discuss regarding qualitative product distribution for reactions in parallel. 04
(c) How performance of mixed flow reactors and plug flow reactors can be
generalized for a n
th
order reactions?
07
Q.5 (a) Define standard heat of reaction and combustion. 03
(b) What is equilibrium conversion? How is it related to equilibrium constant and
temperature for case of a first order reversible reaction?
04
2
(c) For reversible first order aqueous reaction, A?R, starting with pure A, kinetic
experiments in a batch reactor gives 58.1 % conversion in 1 min at 65 ?C and
60 % conversion in 10.1 min at 25 ?C. Find the rate expression for this reaction.
07
OR
Q.5 (a) Mention the essential properties of a catalyst and its classification. 03
(b) Discuss the effect of modifiers and promoters on the activity of catalyst 04
(c) Derive a rate law for decomposition of cumene from benzene and propylene,
considering desorption of benzene as rate limiting from the surface of catalyst.
07
*************
FirstRanker.com - FirstRanker's Choice
This post was last modified on 20 February 2020