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CHMT3039A - Mass Transport and Operations - Assignment 2 Sample Answers £10.20   Add to cart
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CHMT3039A - Mass Transport and Operations - Assignment 2 Sample Answers
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  • Module
  • Mass Transport and Operations (CHMT3039A)
  • Institution
  • University Of The Witwatersrand (wits)

This document provides (sample) answers to a set of questions that can be used as a guide to assist in the completion of Assignment 2 in this course. The questions are shown on the first page of this document (See Preview). Achieved 74.4%

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Document information

  • January 16, 2023
  • 9
  • 2022/2023
  • Other
  • Unknown

Subjects

  • mass transfer
  • mass transport
  • chmt3039a
  • gas liquid systems
  • liquid liquid systems
  • gas liquid solid systems
  • boundary layer theory
  • film p
  • mass transport and operations
  • mass transfer with chemical reaction

Written for

  • University of the Witwatersrand (wits)
  • Mass Transport and Operations (CHMT3039A)
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CHMT3039A:
Mass Transport and Operations:
Assignment 2:
Sample answers to:
1. For each of the following systems, give a typical example of an application of mass
transfer with chemical reaction: (1) gas-liquid systems, (2) liquid-liquid systems, and (3)
gas-liquid-solid systems.
2. Many theories such as the boundary laver. film-penetration, surface-stretch and others
are available to explain the behaviour of mass transfer coefficients. The theories are
based on both molecular and turbulent diffusion. Explain and/or describe the three
mentioned theories.
3. (a) With the aid of well labelled diagrams, derive the general equations of the operating
lines in counter-current and co-current processes for gas absorption. (b) Illustrate
graphically the equilibrium and operating lines for counter-current and co- current
processes when the solute moves from the absorbing solvent into the carrier gas. State all
the assumptions and clearly define all nomenclature used.
4. Assume that you are a newly employed Chemical Engineer and your supervisor wants to
test how best you understand mass transfer concepts through the following question. Let
the chemical reaction of the components of species X with dissolved components of
species Y be governed by the following equation:
X + vY → products
Assuming that species X are consumed through a first order reaction derive an equation
for the molar flux of X based on the film theory. State any assumptions and define any
nomenclature used.

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