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A solid carbohydrate (CaHbOc ) with a specific gravity of

Elementary Principles of Chemical Processes | 3rd Edition | ISBN: 9780471687573 | Authors: Richard M Felder ISBN: 9780471687573 143

Solution for problem 5.82 Chapter 5

Elementary Principles of Chemical Processes | 3rd Edition

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Elementary Principles of Chemical Processes | 3rd Edition | ISBN: 9780471687573 | Authors: Richard M Felder

Elementary Principles of Chemical Processes | 3rd Edition

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Problem 5.82

A solid carbohydrate (CaHbOc ) with a specific gravity of 1.59 is placed in a 1.000-liter combustion chamber. The chamber is evacuated and then charged with pure oxygen. Complete combustion of the carbohydrate takes place. A sample of the product gas is cooled to condense all the water formed in the combustion, and the remaining gas is analyzed by gas chromatography. The following data are obtained: Mass ofCarbohydrate Charged: 3.42 g Chamber Conditions Prior to Combustion: T = 26.8C, P = 499.9 kPa Chamber Conditions Following Combustion: T = 483.4C, P = 1950.0 kPa Product Gas Analysis: 38.7 mole% COz, 25.8% Oz, 35.5% HzO Assume (i) none of the carbohydrate is lost when the chamber is evacuated and (ii) the vapor pressure of the carbohydrate at 27C is negligible. Do not neglect the volume of the carbohydrate and do not assume ideal gas behavior. (a) Determine at least two possible molecular formulas for the carbohydrate (i.e., sets of integer values of a, b, and c) consistent with the given data. (b) If the molecular weight of the carbohydrate is independently determined to be in the range 300 to 350. what is its molecular formula?

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Chapter 5, Problem 5.82 is Solved
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Textbook: Elementary Principles of Chemical Processes
Edition: 3
Author: Richard M Felder
ISBN: 9780471687573

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A solid carbohydrate (CaHbOc ) with a specific gravity of