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5.5 A series of experiments are done using a membrane osmometer on a sample of polystyrene, PS, dissolved in benzene. In each case, the left side of the osmometer contains pure benzene, while the right side contains benzene plus PS at the listed concentrations. The height differential (Ah) is measured for each sample, and the height of the column of benzene (higher on the left) can be converted into a pressure. The experiment was done at 25 °C, where the density of benzene is 874 kg/m³. C (g/dL) 0 0.13 0.29 0.45 0.72 0.94 8.32 II (or Ah), cm of benzene 0 0.38 0.82 1.25 1.92 2.39 461.0 Determine the number-average molecular weight, Mn, of PS from these data. works so that you can convert Hint: if you are unfamiliar with liquid heights used as pressure, look up how a from cm of fluid to a pressure unit. It may be easiest to convert units prior to constructing a plot. Any graph used in this problem should be done using a computer, and included with your homework set as a print-out. Also, if you decide to throw out any data, give an explanation why the data was (were) not used in your calculation.

5.5 A series of experiments are done using a membrane osmometer on a sample of polystyrene, PS, dissolved in benzene. In each case, the left side of the osmometer contains pure benzene, while the right side contains benzene plus PS at the listed concentrations. The height differential (Ah) is measured for each sample, and the height of the column of benzene (higher on the left) can be converted into a pressure. The experiment was done at 25 °C, where the density of benzene is 874 kg/m³. C (g/dL) 0 0.13 0.29 0.45 0.72 0.94 8.32 II (or Ah), cm of benzene 0 0.38 0.82 1.25 1.92 2.39 461.0 Determine the number-average molecular weight, Mn, of PS from these data. works so that you can convert Hint: if you are unfamiliar with liquid heights used as pressure, look up how a from cm of fluid to a pressure unit. It may be easiest to convert units prior to constructing a plot. Any graph used in this problem should be done using a computer, and included with your homework set as a print-out. Also, if you decide to throw out any data, give an explanation why the data was (were) not used in your calculation.

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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5.5 A series of experiments are done using a membrane osmometer on a sample of polystyrene, PS, dissolved in benzene. In each case, the left side of the osmometer contains pure benzene, while the right side contains benzene plus PS at the listed concentrations. The height differential (Ah) is measured for each sample, and the height of the column of benzene (higher on the left) can be converted into a pressure. The experiment was done at 25 °C, where the density of benzene is 874 kg/m³. C (g/dL) 0 0.13 0.29 0.45 0.72 0.94 8.32 II (or Ah), cm of benzene 0 0.38 0.82 1.25 1.92 2.39 461.0 Determine the number-average molecular weight, Mn, of PS from these data. Hint: if you are unfamiliar with liquid heights used as pressure, look up how a manometer works so that you can convert from cm of fluid to a pressure unit. It may be easiest to convert units prior to constructing a plot. Any graph used in this problem should be done using a computer, and included with your homework set as a print-out. Also, if you decide to throw out any data, give an explanation why the data was (were) not used in your calculation.
Transcribed Image Text:5.5 A series of experiments are done using a membrane osmometer on a sample of polystyrene, PS, dissolved in benzene. In each case, the left side of the osmometer contains pure benzene, while the right side contains benzene plus PS at the listed concentrations. The height differential (Ah) is measured for each sample, and the height of the column of benzene (higher on the left) can be converted into a pressure. The experiment was done at 25 °C, where the density of benzene is 874 kg/m³. C (g/dL) 0 0.13 0.29 0.45 0.72 0.94 8.32 II (or Ah), cm of benzene 0 0.38 0.82 1.25 1.92 2.39 461.0 Determine the number-average molecular weight, Mn, of PS from these data. Hint: if you are unfamiliar with liquid heights used as pressure, look up how a manometer works so that you can convert from cm of fluid to a pressure unit. It may be easiest to convert units prior to constructing a plot. Any graph used in this problem should be done using a computer, and included with your homework set as a print-out. Also, if you decide to throw out any data, give an explanation why the data was (were) not used in your calculation.
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