A group additivity approach for the estimation of heat capacities of organic liquids and solids at 298 K |
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Authors: | James S Chickos Donald G Hesse Joel F Liebman |
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Institution: | (1) Department of Chemistry, University of Missouri-St. Louis, 63121 St. Louis, Missouri;(2) Department of Chemistry and Biochemistry, University of Maryland Baltimore County, 21228 Baltimore, Maryland |
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Abstract: | A group additivity method is described which provides heat capacity estimates of the condensed phase. The data base consists of 810 liquids and 446 solids. Group values for carbon in various common substitution and hybridization states and for 47 functional groups are provided. The standard error of estimation using this approach on this data base is 19.5 (liquids) and 26.9 J/ (mole K) (solids). This can be compared to typical experimental uncertainties of 8.12 and 23,4 J/ (mole K) associated with these measurements, respectively. Experimental uncertainties were estimated from the numerical differences obtained for a given substance from multiple independent literature reports. |
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Keywords: | Group additivity estimation of heat capacity |
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