Page 233 - Elements of Chemical Reaction Engineering 3rd Edition

Chap. 4 Questions and Problems 205

(where y = PP0)
k = 10.0 k = 0.15
a = 0.01 K, = 4.0
E = 0.33 v, = 10.0
0, = 2.0 uo = 0.1
CAO = 0.01 Fso = 0.02

FA0 = 15.0 N*o = 0.02
W,,, = 80 tfha, = 200

QUESTIONS AND PROBLEMS

The subscript to each of the problem numbers indicates the level of difficulty: A, least
difficult; D, most difficult.
Before solving the A=. B=H C=*
problems, state or I)=*+
sketch qualitatively the In each of the questions and problems below, rather than just drawing a box around
expwtf? results or your answer, write a sentence or two describing how you solved the problem, the
trends. assumptions you made, the reasonableness of your answer, what you learned, and any
other ;facts that you want to include. You may wish to refer to W. Strunk and E. B.
White, The Elements of Style (New York Macmillian, 1979) and Joseph M. Williams,
Style: Ten Lessons in Clarity & Grace (Glenview, Ill.: Scott, Foresman, 1989) to
enhance the quality of your sentences.
P4-lA kead through all the problems at the end of this chapter. Make up and sollve atl
original problem based on the material in this chapter. (a) Use real data and
reactions. (b) Make up a reaction and data. (c) Use an example from everyday
life (e.g., making toast or cooking spaghetti). In preparing your original prob-
lem, first list the principles you want to get across and why the probltem is
important. Ask yourself how your example will be different from those Xn the
text or lecture. Other things for you to consider when choosing a problem are
relevance, interest, impact of the solution, time required to obtain a solution,
and degree of difficulty. Look through some of the journals for data or to get
some ideas for industrially important reactions or for novel applications of reac-
tion engineering principles (the environment, food processing, etc.). At the end
of the problem and solution describe the creative process used to generate the
idea for the problem. (d) Write a question based on the material in this chapter
that requires critical thinking. Explain why your question requires critical think-
ing.[Hint: See preface e. xx] (e) Listen to the audios on the CD
Notes and pick one and say why it could be eliminated.
P4-& What if... you were asked to explore the example problems in this chapter to
learn the effects of varying the different parameters? This sensitivity analysis
can be carried out by either downloading the examples from the WWW or by
loading the programs from the CD-ROM supplied with the text. For each of the
example problems you investigate, write a paragraph describing your findings.
(a) What if you were asked to give examples of the material in this book
that are found in everyday life? What would you say?