Elements of
Chemical Reaction Engineering
6th Edition



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Essentials of
Chemical Reaction Engineering
Second Edition

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Chapter 9: Reaction Mechanisms, Pathways, Bioreactions and Bioreactors

Additional Homework Problems

CDP9-PB

Sketch the polymer concentration, Pj, mole fraction of polymer with j monomer units, yj, and the corresponding weight fraction, wj, for j=2, 10, 20 as a function of monomer conversion in Styrene polymerization for
(a)  Termination by means other than combination.
(b)  Termination by combination. The molecular weight of the monomer is 25 and its initial concentration is 3 M and the initiator concentration is 0.01 M.
(c)  How would your answers to parts (a) and (b) change if the initiator concentration were 0.0001 M?
(d)  What are the corresponding average molecular weights at X = 0.2, 0.8, and 0.999?