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  Home > JCE Print > Journal of Chemical Education > Issues > 2005  > December  >
Research: Science and Education
Further Analysis of Boiling Points of Small Molecules, CHwFxClyBrz
Guy Beauchamp
Department of Chemistry, Collège de l'Outaouais, Gatineau, Québec J8Y 6M5, Canada
Cover
December 2005
Vol. 82 No. 12
p. 1842
Abstract
One of the goals of physical chemistry is to better understand the relationships between the observed physical properties of molecules and the molecular or atomic parameters that may explain the macroscopic behavior. An article published in this Journal studied the boiling points of molecules having a similar structure (Laing, M. J. Chem. Educ. 2001, 78, 1544–1550). Multiple linear regression analysis was useful in selecting predictor variables that could significantly clarify the boiling point variation of the CHwFxClyBrz molecules. The important combination of the molar refraction (polarizability) and the weak H-bonding was emphasized in the development of a linear model equation ( r2 = 0.998). In this group of molecules the dipole moment does not play a significant role in explaining the boiling point variation. There were no outliers.
More Information
*  Citation
 Beauchamp, Guy. J. Chem. Educ. 2005 82 1842.
*  Keywords
 Alkanes / Cycloalkanes; Analogies / Transfer; Chemometrics; Computer-Based Learning; First-Year Undergraduate / General; Hydrogen Bonding; Molecular Properties / Structure; Physical Chemistry; Physical Properties; Second-Year Undergraduate
*  History
 Created:
Last Updated:		 October 25, 2005
November 4, 2005
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