10.3 For a linear molecule of polyethylene of molar mass 119,980 g mol-¹, calculate: (a) the contour length of the molecule, (b) the end-to-end distance in the fully-extended molecule, and (c) the root-mean-square end-to-end distance according to the valence angle model. In the calculations, end groups can be neglected and it may be assumed that the C-C bonds are of length 0.154 nm and that the valence angles are 109.5°. Comment upon the values obtained. Indicate, giving your reasoning, which of the very large number of possible conformations of the molecule is the most stable.
10.3 For a linear molecule of polyethylene of molar mass 119,980 g mol-¹, calculate: (a) the contour length of the molecule, (b) the end-to-end distance in the fully-extended molecule, and (c) the root-mean-square end-to-end distance according to the valence angle model. In the calculations, end groups can be neglected and it may be assumed that the C-C bonds are of length 0.154 nm and that the valence angles are 109.5°. Comment upon the values obtained. Indicate, giving your reasoning, which of the very large number of possible conformations of the molecule is the most stable.
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Transcribed Image Text:10.3 For a linear molecule of polyethylene of molar mass 119,980 g mol-¹, calculate:
(a)
the contour length of the molecule,
(b)
the end-to-end distance in the fully-extended molecule, and
(c) the root-mean-square end-to-end distance according to the valence angle
model.
In the calculations, end groups can be neglected and it may be assumed that the C-C bonds
are of length 0.154 nm and that the valence angles are 109.5°. Comment upon the values
obtained. Indicate, giving your reasoning, which of the very large number of possible
conformations of the molecule is the most stable.
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