Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 77: Issue 1
Thermody namic functions of 1,2-alkanediols in dilute aqueous solutions
Authors:
M. Fujisawa Kinki University Uchita-cho, Naga-gun Department of Biotechnological Science Wakayama 649-6493 Japan Wakayama 649-6493 Japan

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T. Matsushita Kinki University Kowakae Department of Chemistry Higashi-osaka 577-8502 Japan Higashi-osaka 577-8502 Japan

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Y. Matsui Kinki University Uchita-cho, Naga-gun Department of Biotechnological Science Wakayama 649-6493 Japan Wakayama 649-6493 Japan

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K. Akasaka Kinki University Uchita-cho, Naga-gun Department of Biotechnological Science Wakayama 649-6493 Japan Wakayama 649-6493 Japan

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T. Kimura Kinki University Kowakae Department of Chemistry Higashi-osaka 577-8502 Japan Higashi-osaka 577-8502 Japan

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Pages:
225–231
Online Publication Date:
03 Nov 2004
Publication Date:
01 Jul 2004
Article Category:
Research Article
DOI:
https://doi.org/10.1023/b:jtan.0000033207.46487.09
Keywords:
1; heat capacity; hydrophobic hydration; infinite dilution; 2-alkanediol
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Abstract  

The heat capacities of binary aqueous solutions of 1,2-ethanediol, 1,2-propanediol and 1,2-butanediol were measured at temperatures ranging from 283.15 to 338.15 K by differential scanning calorimetry. The partial molar heat capacities at the infinite dilution were then calculated for the respective alkanediols. For 1,2-ethanediol or 1,2-propanediol, the partial molar heat capacities at the infinite dilution of increased with increasing temperature. In contrast, the partial molar heat capacities of 1,2-butanediol at the infinite dilution decreased with increasing temperature. Heat capacity changes by dissolution of the alkanediols were also determined. Heat capacity changes caused by the dissolution of 1,2-ethanediol or 1,2-propanediol were increase with increasing temperature. On the other hand, heat capacity changes caused by the dissolution of 1,2-butanediol are decrease with increasing temperature. Thus our results indicated that the structural changes of water caused by the dissolution of 1,2-butanediol differed from that of the two other alkanediols.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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