Thermochemistry of sesquiterpene lactone argolide

The enthalpies of dissolution of argolide (C 15 H 20 O 3 ) in 96% ethanol are determined by isothermal calorimetry at 298.15 K and different dilutions of 1: 18 000, 1: 36 000, and 1: 72 000 (by mole). The standard enthalpy of dissolution of argolide in 96% ethanol is calculated from the obtained dat...

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Bibliographic Details
Published in:Russian Journal of Physical Chemistry A 2017, Vol.91 (1), p.6-9
Main Authors: Kasenova, Sh. B., Atazhanova, G. A., Kasenov, B. K., Sagintaeva, Zh. I., Kishkentaeva, A. S., Adekenov, S. M.
Format: Article
Language:English
Subjects:
Chemical Thermodynamics and Thermochemistry
Chemistry
Chemistry and Materials Science
Dissolution
Enthalpy
Ethanol
Heat measurement
Physical Chemistry
Specific heat
Temperature dependence
Thermochemistry
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Summary:The enthalpies of dissolution of argolide (C 15 H 20 O 3 ) in 96% ethanol are determined by isothermal calorimetry at 298.15 K and different dilutions of 1: 18 000, 1: 36 000, and 1: 72 000 (by mole). The standard enthalpy of dissolution of argolide in 96% ethanol is calculated from the obtained data: (86 ± 17) kJ mol −1 . The temperature dependence of heat capacity of C 15 H 20 O 3 is studied by means of dynamic calorimetry. An equation is derived to describe the С p 0 ~ f ( Т ) dependence, and the standard heat capacity at 298.15 K is found to be (393 ± 13) J mol −1 K −1 . The enthalpies of combustion, fusion and formation of argolide are calculated via approximation.
ISSN:0036-0244
1531-863X
DOI:10.1134/S0036024417010113