Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 75: Issue 1
Low temperature heat capacity of the coordination compound: Nickel(II) nitrate with 4-amine-1,2,4-triazole at temperatures from 11 to 317 K
Authors:
V. Bessergenev Russian Academy of Sciences Nikolayev Institute of Inorganic Chemistry, Siberian Division Novosibirsk 630090 Russia Novosibirsk 630090 Russia

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Yu. Kovalevskaya Russian Academy of Sciences Nikolayev Institute of Inorganic Chemistry, Siberian Division Novosibirsk 630090 Russia Novosibirsk 630090 Russia

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L. Lavrenova Russian Academy of Sciences Nikolayev Institute of Inorganic Chemistry, Siberian Division Novosibirsk 630090 Russia Novosibirsk 630090 Russia

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I. Paukov Russian Academy of Sciences Nikolayev Institute of Inorganic Chemistry, Siberian Division Novosibirsk 630090 Russia Novosibirsk 630090 Russia

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Pages:
331–336
Online Publication Date:
02 Nov 2004
Publication Date:
25 Jan 2004
Article Category:
Research Article
DOI:
https://doi.org/10.1023/b:jtan.0000017353.24441.25
Restricted access

Abstract  

Low-temperature heat capacity of the coordination compound of nickel(II) nitrate with 4-amine-1,2,4-triazole was measured in the temperature range from 11 to 317 K using a computerized vacuum adiabatic calorimeter. The thermodynamic functions have been derived from the smoothed experimental data over the whole temperature interval covered and at standard conditions. At 298.15 K, the heat capacity is 574.7±1.2 J K-1 mol-1, the entropy is 599.2±1.2 J K-1 mol-1, the enthalpy is 91070±200 J mol-1, and the reduced Gibbs energy is 293.7±1.2 J K-1 mol-1. The results on Cp(T) were compared with those for Cu(NH2trz)3(NO3)2·0.5H2O. It was revealed that the slope of the curve dCp/dT (T) changes essentially for both compounds at 110-120 K. It implies that additional degrees of freedom appear in the heat capacity at these temperatures.

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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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