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Calorimetric measurements of sodium chloride dihydrate (hydrohalite). / Drebushchak, V. A.; Ogienko, A. G.
в: Journal of Thermal Analysis and Calorimetry, Том 140, № 5, 01.06.2020, стр. 2555-2562.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Calorimetric measurements of sodium chloride dihydrate (hydrohalite)
AU - Drebushchak, V. A.
AU - Ogienko, A. G.
N1 - Publisher Copyright: © 2019, Akadémiai Kiadó, Budapest, Hungary. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/6/1
Y1 - 2020/6/1
N2 - Calorimetric measurements of sodium chloride dihydrate NaCl·2H2O (mineral name hydrohalite) were carried out with using DSC. Heat capacity from 190 to 250 K was measured and found to increase from 109 to 137 J mol−1 K−1. The enthalpy of formation of hydrohalite from solid ice and halite at 273.15 K was derived from the thermal effect of melting/decomposition in DSC measurements and found to be close to − 1.8 kJ mol−1. The same DSC results show clearly that the upper temperature limit for the existence of hydrohalite is several degrees greater than the current value of 273.15 K accepted for the peritectic decomposition of hydrohalite. The phase diagram of the NaCl–H2O system needs correction.
AB - Calorimetric measurements of sodium chloride dihydrate NaCl·2H2O (mineral name hydrohalite) were carried out with using DSC. Heat capacity from 190 to 250 K was measured and found to increase from 109 to 137 J mol−1 K−1. The enthalpy of formation of hydrohalite from solid ice and halite at 273.15 K was derived from the thermal effect of melting/decomposition in DSC measurements and found to be close to − 1.8 kJ mol−1. The same DSC results show clearly that the upper temperature limit for the existence of hydrohalite is several degrees greater than the current value of 273.15 K accepted for the peritectic decomposition of hydrohalite. The phase diagram of the NaCl–H2O system needs correction.
KW - DSC
KW - Enthalpy of formation
KW - Heat capacity
KW - Hydrohalite
KW - SEA-ICE
KW - SYSTEM
KW - THERMODYNAMIC PROPERTIES
KW - PHASE
KW - THERMAL-ENERGY STORAGE
UR - http://www.scopus.com/inward/record.url?scp=85074753991&partnerID=8YFLogxK
U2 - 10.1007/s10973-019-08954-7
DO - 10.1007/s10973-019-08954-7
M3 - Article
AN - SCOPUS:85074753991
VL - 140
SP - 2555
EP - 2562
JO - Journal of Thermal Analysis and Calorimetry
JF - Journal of Thermal Analysis and Calorimetry
SN - 1388-6150
IS - 5
ER -
ID: 22323209