Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 64: Issue 1
Deuterium Isotope Effect on Excess Enthalpies of Methanol or Ethanol and Their Deuterium Derivatives at 298.15 K
Authors:
T. Kimura Kinki University Department of Chemistry 3-4-1 Kowakae Higashi-osaka 577-8502 Japan 3-4-1 Kowakae Higashi-osaka 577-8502 Japan

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T. Matsushita Kinki University Department of Chemistry 3-4-1 Kowakae Higashi-osaka 577-8502 Japan 3-4-1 Kowakae Higashi-osaka 577-8502 Japan

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K. Ueda Kinki University Department of Chemistry 3-4-1 Kowakae Higashi-osaka 577-8502 Japan 3-4-1 Kowakae Higashi-osaka 577-8502 Japan

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K. Tamura Osaka City University Department of Chemistry 3-3-138 Sugimoto Sumiyoshi-ku, Osaka 558-8585 Japan 3-3-138 Sugimoto Sumiyoshi-ku, Osaka 558-8585 Japan

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S. Takagi Kinki University Department of Chemistry 3-4-1 Kowakae Higashi-osaka 577-8502 Japan 3-4-1 Kowakae Higashi-osaka 577-8502 Japan

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Pages:
231–241
Online Publication Date:
02 Nov 2004
Publication Date:
01 Apr 2001
Article Category:
Research Article
DOI:
https://doi.org/10.1023/a:1011553500435
Keywords:
deuterium isotope effect; ethanol; ethanol-d1; ethanol-d6; excess enthalpy; methanol; methanol-d1; methanol-d4
Restricted access

Abstract  

Excess enthalpies of six binary mixtures of CH3 OD+CH3 OH, CH3 OD+CD3 OD, CD3 OD+CH3 OH, C2 D5 OD+C2 H5 OH, C2 D5 OD+C2 H5 OD, C2 H5 OD+C2 H5 OH have been determined over the whole range of mole fractions at 298.15 K in order to know the isotopic effect on hydrogen-bonding accurately, although there are many reports on the differences in the strength of hydrogen-bonding between OH and OD. All excess enthalpies measured are very small and endothermic. The mixtures of CH3 OD+ CH3 OH, and C2 D5 OD+C2 H5 OH showed the largest excess enthalpies among each methanol and ethanol mixtures. The difference of intermolecular interaction between OH and OD in methanol and ethanol was almost same value of (1.820.04) J mol-1 Excess enthalpies of 1,4-dimethylbenzene+1,3-dimethylbenzene and 1,4-dimethylbenzene+1,2-methylbenzene were measured by three different principle calorimeters at 298.15 K in order to know the precision of calorimetry for a small enthalpy change.

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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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