(а) Complete the last two columns of the table. Molecular Weight fraction wi * Mi i Number x * M, weight (M) (g/mol) 7,500 12,500 17,500 22,500 fraction (g/mol) (g/mol) (x) 0.16 (w) 0.08 1 2 0.44 0.38 0.25 0.30 4 0.15 0.24 (b) Using the information in the table, calculate values for M, and Mw in g/mol. (c) Calculate the degree of polymerization for polyethylene using your value for M, above. 'Ihe repeat unit of polyethylene is shown below. H H
(а) Complete the last two columns of the table. Molecular Weight fraction wi * Mi i Number x * M, weight (M) (g/mol) 7,500 12,500 17,500 22,500 fraction (g/mol) (g/mol) (x) 0.16 (w) 0.08 1 2 0.44 0.38 0.25 0.30 4 0.15 0.24 (b) Using the information in the table, calculate values for M, and Mw in g/mol. (c) Calculate the degree of polymerization for polyethylene using your value for M, above. 'Ihe repeat unit of polyethylene is shown below. H H
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Transcribed Image Text:2.
Polyethylene has been synthesized with a distribution of different sized polymers that
have been characterized in the table below.
(a)
Complete the last two columns of the table.
Weight
fraction
x; * Mi
(g/mol)
wi * Mi
(g/mol)
i
Molecular
Number
weight (M)
(g/mol)
7,500
12,500
fraction
(x)
0.16
(w)
0.08
1
0.44
0.38
3
17,500
22,500
0.25
0.30
4
0.15
0.24
(b)
Using the information in the table, calculate values for M, and Mw in g/mol.
(c)
Calculate the degree of polymerization for polyethylene using your value for M,
above. The repeat unit of polyethylene is shown below.
нн
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