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The measurement of hydration heats for magnesium chloride with low waterby means of DSC
Chen, J; Ma, P; Chen, G; Chen, F
2001
Source PublicationJOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
ISSN1418-2874
Volume65Issue:3Pages:777-786
AbstractThe heats of hydration reactions for MgCl2. 4H(2)O and MgCl2. 2H(2)O include two parts, reaction enthalpy and adsorption heat of aqueous vapor on the surfaces of magnesium chloride hydrates. The hydration heat for the reactions MgCl2. 4H(2)O+2H(2)O --> MgCl2. 6H(2)O and MgCl2. 2H(2)O+2H(2)O --> MgCl2. 4H(2)O, measured by DSC-111, is -30.36 and -133.94 kJ mol(-1), respectively. The adsorption heat of these hydration processes, measured by head-on chromatography method, is -13.06 and -16.11 kJ mol(-1), respectively. The molar enthalpy change for the above two reactions is -16.64 and -118.09 kJ mol(-1), respectively. The comparison between the experimental data and the theoretical values for these hydration processes indicates that the results obtained in this study are quite reliable. The heats of hydration reactions for MgCl2. 4H(2)O and MgCl2. 2H(2)O include two parts, reaction enthalpy and adsorption heat of aqueous vapor on the surfaces of magnesium chloride hydrates. The hydration heat for the reactions MgCl2. 4H(2)O+2H(2)O --> MgCl2. 6H(2)O and MgCl2. 2H(2)O+2H(2)O --> MgCl2. 4H(2)O, measured by DSC-111, is -30.36 and -133.94 kJ mol(-1), respectively. The adsorption heat of these hydration processes, measured by head-on chromatography method, is -13.06 and -16.11 kJ mol(-1), respectively. The molar enthalpy change for the above two reactions is -16.64 and -118.09 kJ mol(-1), respectively. The comparison between the experimental data and the theoretical values for these hydration processes indicates that the results obtained in this study are quite reliable.
Indexed BySCI
Document Type期刊论文
Identifierhttp://ir.isl.ac.cn/handle/363002/2337
Collection青海盐湖研究所知识仓储
Recommended Citation
GB/T 7714
Chen, J,Ma, P,Chen, G,et al. The measurement of hydration heats for magnesium chloride with low waterby means of DSC[J]. JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY,2001,65(3):777-786.
APA Chen, J,Ma, P,Chen, G,&Chen, F.(2001).The measurement of hydration heats for magnesium chloride with low waterby means of DSC.JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY,65(3),777-786.
MLA Chen, J,et al."The measurement of hydration heats for magnesium chloride with low waterby means of DSC".JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY 65.3(2001):777-786.
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