A repeat unit of polyacrylonitrile (PAN) is shown in Fig. Q4(d) and its molecular weight data is tabulated in Table Q4(d). Calculate (1) the number-average molecular weight, (1i) the weight-average molecular weight H CH3 —с-с— H N Fig. Q4(d) Table Q4(d) | Molecular Weight Range (g/mol) Number Fraction, A Weight Fraction, w 0.01 0- 10000 10000 – 20000 20000 – 30000 30000 – 40000 40000 – 50000 50000 – 60000 60000 – 70000 0.03 0.05 0.04 0.16 0.17 0.19 0.12 0.14 0.18 0.22 0.16 0.21 0.15 0.07 70000 – 80000 0.10
A repeat unit of polyacrylonitrile (PAN) is shown in Fig. Q4(d) and its molecular weight data is tabulated in Table Q4(d). Calculate (1) the number-average molecular weight, (1i) the weight-average molecular weight H CH3 —с-с— H N Fig. Q4(d) Table Q4(d) | Molecular Weight Range (g/mol) Number Fraction, A Weight Fraction, w 0.01 0- 10000 10000 – 20000 20000 – 30000 30000 – 40000 40000 – 50000 50000 – 60000 60000 – 70000 0.03 0.05 0.04 0.16 0.17 0.19 0.12 0.14 0.18 0.22 0.16 0.21 0.15 0.07 70000 – 80000 0.10
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:d) A repeat unit of polyacrylonitrile (PAN) is shown in Fig. Q4(d) and its molecular weight data
is tabulated in Table Q4(d). Calculate
(i) the number-average molecular weight,
(i1) the weight-average molecular weight
H CH3
—с-с-
H
N
Fig. Q4(d)
Table Q4(d)
Molecular Weight Range (g/mol) Number Fraction, x
Weight Fraction, w
0.01
0- 10000
0.03
10000 – 20000
0.05
0.04
20000 – 30000
0.12
0.16
0.17
30000 – 40000
0.14
40000 – 50000
0.18
0.19
50000 – 60000
0.22
0.21
60000 – 70000
0.16
0.15
70000 – 80000
0.10
0.07
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