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Volume 4 (1977)
- Issue 4 Pages 139-
- Issue 3 Pages 89-
- Issue 2 Pages 45-
- Issue 1 Pages 3-
Volume 4, Issue 3
Displaying 1-9 of 9 articles from this issue
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Shigeo Murata, Minoru Sakiyama, Syûzô Seki1977 Volume 4 Issue 3 Pages 89-95
Published: July 15, 1977
Released on J-STAGE: September 07, 2009
JOURNAL FREE ACCESSThe enthalpies of reaction of Mg(CH3COO)2(c, α), Mg(CH3COO)2(amorph) and Mg(CH3COO)2·4H2O(c) with 1mol dm-3 HCl were measured by an LKB-8700 reaction calorimeter. The following standard enthalpies of formation at 298.15K were determined:
ΔH°f(Mg(CH3COO)2, (c, α)=-(1367.70±0.60),
ΔH°f(Mg(CH3COO)2, amorph)=-(1359.77±0.63),
ΔH°f(Mg(CH3COO)2·4H2O, c)=-(2566.13±0.63)kJ mol-1
The enthalpy changes for the following processes have been calculated:
Mg(CH3COO)2(c)+4H2O(g)→Mg(CH3COO)2·4H2O(c)
ΔHhyd=-(238.4±0.2)kJ mol-1,
Mg(CH3COO)2(amorph)→Mg(CH3COO)2(c)
ΔHcryst=-(7.93±0.16)kJ mol-1.
Homolytic and heterolytic lattice enthalpy of Mg(CH3COO)2 (c) were calculated to be 1148 and 2685kJ mol-1, respectively.View full abstractDownload PDF (776K) -
Sachio Murakami, Ryoichi Fujishiro1977 Volume 4 Issue 3 Pages 96-99
Published: July 15, 1977
Released on J-STAGE: September 07, 2009
JOURNAL FREE ACCESSRecently, excess enthalpies of polar-nonpolar liquid mixtures were measured and discussed qualitatively in our laboratory. In order to discuss the thermochemical behaviors of their solutions quantitatively, the free volume theory was extended to the polar-nonpolar liquid mixture using the so-called Scott's two fluid model. The resulting expression for excess enthalpy consists of three contributions of dispersion, dipole-dipole and dipole-induced dipole interactions. It was compared with the experimental excess enthalpies for CCl4-cis-dichloroethylene, dichloroethylene isomers mixtures, and chlorobenzene, o- and m- dichlorobenzene-cyclohexane and-benzene systems. It was found that the molecular orientation in solution was predicted from an adjustable parameter m.View full abstractDownload PDF (535K) -
Tadao Ishii, Ryusaburo Furuichi, Kazuhiko Kudo1977 Volume 4 Issue 3 Pages 100-102
Published: July 15, 1977
Released on J-STAGE: September 07, 2009
JOURNAL FREE ACCESSThe chlorination processes of bauxite, which consists mainly of gibbsite(Al) and hematite(Fe), were studied in the presence of active carbon by means of a gas-flow type DTA apparatus. Of the two exothermic peaks appeared at about 270 and 490°C, the former was found to correspond to the chlorination of Fe and was influenced by the formation of water due to dehydration of gibbsite in bauxite, and the latter corresponded to the chlorination of Al. In order to examine the chlorination behaviors of bauxite in more detail, the chlorination of hydrated alumina, hematite and their mixtures were carried out too.View full abstractDownload PDF (325K) -
Takao Ishida, Takashi Maekawa, Toshio Yokokawa1977 Volume 4 Issue 3 Pages 102-104
Published: July 15, 1977
Released on J-STAGE: September 07, 2009
JOURNAL FREE ACCESSEnthalpies of mixing of gold+tellurium have been measured at 769K by a high temperature calorimeter. The results are in agreement with the values by Castanet et al., but differ from those by Predel and Piehl. The enthalpy of fusion of AuTe2 was also determined. These allow to evaluate the enthalpy of formation of AuTe2 (s).View full abstractDownload PDF (269K) -
S. St. J. Warne1977 Volume 4 Issue 3 Pages 105-106
Published: July 15, 1977
Released on J-STAGE: September 07, 2009
JOURNAL FREE ACCESSDynamic controlled atmosphere differential thermal analysis (DTA), in which the furnace atmosphere is constantly maintained (by purging gas flows) under preselected conditions, such as oxidising, inert, reducing or of the same composition as the gaseous decomposition or pyrolytic products of the sample under test, provides a valuable technique whereby individual DTA peaks may be suppressed, enhanced, moved up or down the temperature scale or even remain completely unaffected (crystallographic inversions/reversions). Such predictable phenomena can be of considerable value in diagnostic mineralogy, content and composition evaluation of minerals together with increasing the detection limits of species such as carbonates.View full abstractDownload PDF (282K) -
Kimio Itagaki, Akira Yazawa1977 Volume 4 Issue 3 Pages 107-116
Published: July 15, 1977
Released on J-STAGE: September 07, 2009
JOURNAL FREE ACCESSThe reliable data on the thermal behaviors for metals, alloys or metallic compounds, and for the reaction between them, are required at increasingly higher temperatures in the field of metallurgy. The recent developments in calorimeters for heats of reaction, solution and mixing studies at high temperatures are reviewed focusing on theoretical and practical purposes in the pyrometallurgy. The reliable calorimeters for use above 1000°C are not so easy to construct, though they are very important in the pyrometallurgy. The present status and some topics of calorimetric investigations for the liquid substances are described. The newly developed method of quantitative thermal analysis using an adiabatic calorimeter is available for determining the thermodynamic quantities in binary melts. The thermal conductivity and emissivity studies are also surveyed briefly.View full abstractDownload PDF (1552K) -
Calorimetry related to biochemical functions (part 2)Harumi Fukada, Katsutada Takahashi1977 Volume 4 Issue 3 Pages 117-125
Published: July 15, 1977
Released on J-STAGE: September 07, 2009
JOURNAL FREE ACCESSDownload PDF (1215K) -
Hiroshi Suga1977 Volume 4 Issue 3 Pages 126-129
Published: July 15, 1977
Released on J-STAGE: September 07, 2009
JOURNAL FREE ACCESSDownload PDF (530K) -
Hirotaro Kambe1977 Volume 4 Issue 3 Pages 130-131
Published: July 15, 1977
Released on J-STAGE: September 07, 2009
JOURNAL FREE ACCESSDownload PDF (284K)
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