Go toArchive
Browse byFacets
Bookbag ( 0 )
'Standard Enthalpy of Formation' in keywords
Results  2 Items
Sorted by   
Section
Publication Year
1999 (1)
1998 (1)
1Author    C. Hennig3, H. Oppermann, A. BlonskabRequires cookie*
 Title    Thermische Zersetzung und Lösungskalorimetrie von Ammoniumeuropiumchloriden Thermal Decomposition and Solution Calorimetry of Ammonium Europium Chlorides  
 Abstract    The thermal decomposition equilibria of ammonium europium chlorides (NH4)3EuCl6, (NH4)2EuC15 and NH4Eu2C17 have been investigated by total pressure measurements in a membrane zero manometer. The thermodynamic data of these solid phases have been deri­ ved from the decomposition functions. The standard enthalpies of solution in 4n HC1 (aq.) of (NH4)3EuC16, (NH4)2EuC15, NH4Eu2C17, EuC13 and Eu20 3 were measured. On the basis of these values and tabulated data, the standard enthalpies at 298 K of the ammonium europium chlorides were derived and compared with the obtained results from the total pressure measu­ rements. Data by total pressure measurement: 
  Reference    Z. Naturforsch. 53b, 1169—1179 (1998); eingegangen am 2. Juni 1998 
  Published    1998 
  Keywords    Ammonium Europium Chlorides, Europium Chloride, Thermal Decomposition, Standard Enthalpy of Formation, Standard Entropy 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-1169.pdf 
 Identifier    ZNB-1998-53b-1169 
 Volume    53 
2Author    C. Hennig, H. OppermannRequires cookie*
 Title    Thermische Zersetzung und Lösungskalorimetrie von Ammoniumneodymbromiden Thermal Decomposition and Solution Calorimetry of Ammonium Neodymium Bromides  
 Abstract    The thermal decomposition equilibria of ammonium neodymium bromides (NH4)3NdBr6, (NH4)2NdBr5 and NH4Nd2Br7 have been investigated by total pressure measurements. The thermodynamical data of these solid phase complexes have been derived from the decomposition functions. The standard enthalpies of solution in 4N HBr (aq.) of (NH4)3NdBr6, (NH4)2NdBr5, NH4Nd2Br7, NdBr3 and Nd20 3 were measured. On the basis of these values and tabulated data, the standard enthalpies at 298 K of the ammonium neodymium bromides were derived and compared with the results obtained from the total pressure measurements. Data by total pressure measurement: /\Hß((NH4)3NdBr6 f i98) = -399,1 ± 4,9 kcal/mol; S°((NH4)3NdBr6f298) = 153,4 ± 7,4 cal/K-mol; Z\H£((NH4)2NdBr5 f 298) = -343,0 ± 4,4 kcal/mol; S°((NH4),NdBr5 f ,98) = 109,9 ± 6 , 8 cal/K-mol; ^H ß(N H 4N d,Br7 f 298) = -484,0 ± 5,1 kcal/mol; S°(NH4Nd2Br7 ff<298) = 127,9 ± 6 , 6 cal/K-mol. Data by solution calorimetry: zAHß(NdBr3 , -> 98) = -208,7 ± 1,6 kcal/mol; ^\Hß((NH4)3-NdBr6 f 298) = -404,8 ± 2,7 kcal/mol; _\H^((NH4),NdBr5 f ,98) = -344,2 ± 2,4 kcal/mol; JkHß(NH4Nd2Br7 f 298) = -482,7 ± 3,7 kcal/mol. 
  Reference    Z. Naturforsch. 54b, 1283—1294 (1999); eingegangen am 22. Juli 1999 
  Published    1999 
  Keywords    Ammonium Neodymium Bromides, Neodymium Bromide, Thermal Decomposition, Standard Enthalpy of Formation, Standard Entropy 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-1283.pdf 
 Identifier    ZNB-1999-54b-1283 
 Volume    54