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Q1: The following polymer sample is composed of: 15% 90-mers, 25% 100- mers, 30% 120-mers, 25% 140-mers, and 5% 155-mers. The repeat unit molecular weight of the polymer is 105 g mol-¹. Calculate each of the following values a) The number-average molecular weight (Mn). - Answer: 12,300 kg mol-¹ b) The weight-average molecular weight (Mw) - Answer: 12,500 kg mol-¹ c) The dispersity (D) - Answer: 1.02

Q1: The following polymer sample is composed of: 15% 90-mers, 25% 100- mers, 30% 120-mers, 25% 140-mers, and 5% 155-mers. The repeat unit molecular weight of the polymer is 105 g mol-¹. Calculate each of the following values a) The number-average molecular weight (Mn). - Answer: 12,300 kg mol-¹ b) The weight-average molecular weight (Mw) - Answer: 12,500 kg mol-¹ c) The dispersity (D) - Answer: 1.02

Introduction to Chemical Engineering Thermodynamics
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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Q1: The following polymer sample is composed of: 15% 90-mers, 25% 100- mers, 30% 120-mers, 25% 140-mers, and 5% 155-mers. The repeat unit molecular weight of the polymer is 105 g mol-¹. Calculate each of the following values a) The number-average molecular weight (Mn). - Answer: 12,300 kg mol-¹ b) The weight-average molecular weight (Mw) - Answer: 12,500 kg mol-¹ c) The dispersity (D) - Answer: 1.02
Transcribed Image Text:Q1: The following polymer sample is composed of: 15% 90-mers, 25% 100- mers, 30% 120-mers, 25% 140-mers, and 5% 155-mers. The repeat unit molecular weight of the polymer is 105 g mol-¹. Calculate each of the following values a) The number-average molecular weight (Mn). - Answer: 12,300 kg mol-¹ b) The weight-average molecular weight (Mw) - Answer: 12,500 kg mol-¹ c) The dispersity (D) - Answer: 1.02
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