NDLI: Low-temperature heat capacities and standard molar enthalpy of formation of 2-pyrazinecarboxylate cupric(II) complex Cu(pyza)$_{2}$(H$_{2}$O)$

Content Provider	Springer Nature Link
Author	Kong, Y. X. Di, Y. Y. Gao, Z. F. Dou, J. M.
Copyright Year	2015
Abstract	2-Pyrazinecarboxylate cupric(II) complex Cu(pyza)$_{2}$(H$_{2}$O)$_{2}$(s) was synthesized by the method of liquid phase synthesis. The composition and structure of the compound were characterized by chemical and elemental analyses and X-ray crystallography. Low-temperature heat capacities of the compound were measured by a precision automated adiabatic calorimeter over the temperature range from 78 to 400 K. A polynomial equation of the heat capacities as a function of the temperature was fitted by the least-square method. The smoothed heat capacities and the thermodynamic functions of the compound relative to 298.15 K were calculated and tabulated at an interval of 5 K. In accordance with Hess’ law, a thermochemical cycle was designed, the enthalpy change in the reaction of 2-pyrazinecarboxylic acid with cupric acetate monohydrate was determined by the use of an isoperibol solution-reaction calorimeter, and the standard molar enthalpy of formation of the complex was calculated to be −(1191.282 ± 2.457) kJ mol$^{−1}$ by the use of the dissolution enthalpies and other auxiliary thermodynamic quantities.
Starting Page	437
Ending Page	446
Page Count	10
File Format	PDF
ISSN	13886150
Journal	Journal of thermal analysis
Volume Number	124
Issue Number	1
e-ISSN	15882926
Language	English
Publisher	Springer Netherlands
Publisher Date	2015-11-07
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Cu(pyza)$_{2}$(H$_{2}$O)$_{2}$(s) Heat capacity Thermodynamic function Dissolution enthalpy Standard molar enthalpy of formation Physical Chemistry Analytical Chemistry Polymer Sciences Inorganic Chemistry Measurement Science and Instrumentation
Content Type	Text
Resource Type	Article
Subject	Physical and Theoretical Chemistry Condensed Matter Physics

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