| 1 | Author
| H. Oppermann, A. Morgenstern | Requires cookie* | | Title
| Verdampfungsverhalten von Lanthantrihalogeniden Evaporation Behaviour o f Lanthanum Trihalides  | | | Abstract
| The evaporation of LaCl3, LaBr3 and Lal3 was investigated in closed tubes under argon atmosphere and correlated with data in the literature. The enthalpies and entropies of evaporation were derived from the temperature functions of pressure: -AH°(v, LaCl3, T) = 48,5 ± 2 kcal/mol, Z\S°(v, LaCl3, T) = 22,0 ± 3 cal/K-mol _AH°(v, LaBr3, T) = 48,0 ± 2 kcal/mol, Z\S°(v, LaBr3, T) = 24,0 ± 2 cal/K-mol J H ° (v , L al3, T) = 49,5 ± 2 kcal/mol, Z\S°(v, L al3, T) = 29,0 ± 2 cal/K-mol | | |
Reference
| Z. Naturforsch. 54b, 617—623 (1999); eingegangen am 11. Februar 1999 | | |
Published
| 1999 | | |
Keywords
| Lanthanum Trihalides, Evaporation, Enthalpy, Entropy | | |
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| default:Reihe_B/54/ZNB-1999-54b-0617.pdf | | | Identifier
| ZNB-1999-54b-0617 | | | Volume
| 54 | |
2 | Author
| H. Oppermann, H. Dao Quoc, M. Zhang-Preße | Requires cookie* | | Title
| Thermical and Calorical Behaviour of Solid LaAl3Br12 and Chemical Transport of LaBr3 with AlBr3  | | | Abstract
| The thermodynamical data of solid Lanthanum Aluminium Bromide LaAl3 Br12 have been obtained by determination of the decomposition equilibria from total pressure measurements. For different compositions LaBr3 /AlBr3, the barogram of the binary system LaBr3 -AlBr3 was constructed and from this and DTA the melting diagram was determined. The chemical trans port of LaBr3 with AlBr3 is suggesting the existence of two gaseous complexes LaAl3 B r12 and LaAl?Br9. The data are: Z\H°B(LaAl3B rl2,f,298) = -587,2 ± 7 kcal/mol, S°(LaAl3Br12,f,298) = 179,3 ± 7 cal/Kmol; zAH°B(LaAl3B r12,g,298) = -548,7 ± 5 kcal/mol, S°(LaAl,Br12,g,298) = 239,4 ± 6 cal/K mol; Z\H°B(LaAl2Br9,g,298) = -619,7 ± 5,5 kcal/mol, S°(LaAl2Br9,g,298) = 212,0 ± 7 cal/K mol. From solution calorimetric measurements follows the enthalpy of formation of the solid com plexes: zAH°B(LaAl3Br12,f,298) = -590,9 ± 3 kcal/mol. Thermisches und kalorisches Verhalten von festem LaAl3Br12 | | |
Reference
| Z. Naturforsch. 56b, 908—916 (2001); eingegangen am 10. Mai 2001 | | |
Published
| 2001 | | |
Keywords
| Lanthanum Alumimium Bromide, Calorimetry, Enthalpy | | |
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| default:Reihe_B/56/ZNB-2001-56b-0908.pdf | | | Identifier
| ZNB-2001-56b-0908 | | | Volume
| 56 | |
3 | Author
| G. Anderegg | Requires cookie* | | Title
| Komplexone, XLVII Die Thermodynamik der Komplexbildung von einigen ein-und zweiwertigen Metallionen mit Aethylendiamintetraacetat-und Uramildiacetat-Ion Complexone, XLVII Thermodynamics of Complex Formation of Some Univalent and Bivalent Metal Ions with Ethylenediaminetetraacetate and Uramildiacetate Anions  | | | Abstract
| The enthalpies of complex formation of EDTA and uramildiacetate (UDA) with univalent cations (H+, Li+, Na+, K + , Ag+ and T1+) have been obtained by direct calori-metric measurements at ionic strength 0.1 (or 1) and 20 °C. For comparison data for the formation of 1:1 UDA complexes with Mg 2+ , Ca 2+ , Ba 2+ and Sr 2+ have also been obtained. From these values and the stability constants the thermodynamic functions A G and A S are calculated. The results are compared with those of similar systems. | | |
Reference
| (Z. Naturforsch. 31b, 786—789 [1976]; eingegangen am 15. März 1976) | | |
Published
| 1976 | | |
Keywords
| EDTA Complexes, Uramildiacetate Complexes, Stability Constants, Enthalpy, Entropy | | |
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| default:Reihe_B/31/ZNB-1976-31b-0786.pdf | | | Identifier
| ZNB-1976-31b-0786 | | | Volume
| 31 | |
4 | Author
| H. Oppermann, M. Zhang, C. Hennig, HeinzDieter Lutz | Requires cookie* | | Title
| Thermochemisches und kalorisches Verhalten von NdA^Cl^ Thermochemical and Calorical Behaviour of NdAl3C l12  | | | Abstract
| The thermodynamical data of solid and gaseous aluminium neodymium chloride have been obtained by determination of the decomposition equilibria (of solid) from total pressure mea surements and chemical transport reactions (gaseous). The melting diagram was determined by DTA. The enthalpy of formation of the solid phase was calculated from their heats of solution and from the enthalpies of formation and the heats of solution of NdCl3 and A1C13. Data by total pressure measurement: ^ H |(N d A l3Cl,2<f<298) = -749,6 ± 2,5 kcal/mol; S°(NdAl3C l12ifj298) = 118,2 ± 3,0 cal/K-mol. Data by solution calorimetry: zAHß(NdAl3C l|2 1298) = -748,6 ± 1,3 kcal/mol. Data by chemical transport: zAH£(NdAl3C l12>g,298) = -701,5 ± 3,0 kcal/mol; S°(NdAl3Cl12-g,298) = 215,0 ± 4,0 cal/K-mol. | | |
Reference
| Z. Naturforsch. 53b, 1343—1351 (1998); eingegangen am 21. Juli 1998 | | |
Published
| 1998 | | |
Keywords
| Aluminium Neodymium Chloride, Decomposition, Thermochemical Data, Enthalpy, Entropy | | |
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| default:Reihe_B/53/ZNB-1998-53b-1343.pdf | | | Identifier
| ZNB-1998-53b-1343 | | | Volume
| 53 | |
5 | Author
| H. Oppermann, H. Dao Quoc, A. Morgenstern, Prof Manfred | Requires cookie* | | Title
| Thermisches Verhalten von festem LaAlCl6 und chemischer Transport von LaCl3 mit AICI3 Thermical Behaviour of Solid LaAlCl6 and Chemical Transport of LaCl3 with A1C13  | | | Abstract
| The thermodynamical data of solid aluminium lanthanum chloride LaAlCl6 have been ob tained by determination of the decomposition equilibria from total pressure measurements. The melting diagram was determined by DTA. The chemical transport of LaCl3 with A1C13 is suggesting the existence of the gaseous complex LaAl3C l12. The data are: Z\H(LaAlCl6 f 298) =-427,1 ±2,5 kcal/mol, S°(LaAlCl6.f.298) = 61 ±2,5 cal/K-mol, _AH(LaAl3C l12 g 298) =-712 ± 7 kcal/mol, S°(LaAl3C l12>g,298) = 205 ± 3 cal/K-mol. | | |
Reference
| Z. Naturforsch. 54b, 1410—1416 (1999); eingegangen am 15. Juli 1999 | | |
Published
| 1999 | | |
Keywords
| Aluminium Lanthanum Chloride, Thermal Decomposition, Chemical Transport, Enthalpy, Entropy | | |
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| default:Reihe_B/54/ZNB-1999-54b-1410.pdf | | | Identifier
| ZNB-1999-54b-1410 | | | Volume
| 54 | |
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