Thermochemistry of magnesium oxysulfate

被引：0
|
作者：
Yue, T
Zhu, LX
Liu, ZH
Gao, SY [1 ]
Xia, SP
机构：
[1] Lanzhou Univ, Dept Chem, Lanzhou 730000, Peoples R China
[2] Chinese Acad Sci, Inst Salt Lakes, Xian Branch, Xian 710043, Shaanxi Prov, Peoples R China
[3] Shaanxi Normal Univ, Inst Appl Chem, Xian 710062, Peoples R China
来源：
THERMOCHIMICA ACTA | 2003年 / 402卷 / 1-2期
关键词：
magnesium oxysulfate; standard molar enthalpy of formation; solution calorimetry; molar enthalpy; aqueous hydrochloric acid solution;
D O I：
暂无
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The enthalpies of solution of magnesium oxysulfate compounds MgSO4-5MgO-7H(2)O and MgSO4-5MgO-8H(2)O in approximately 1 mol dm(-3) aqueous hydrochloric acid were determined. From these results and the enthalpies of solution of MgSO4.7H(2)O and MgO in HCl(aq) respectively, the standard molar enthalpies of formation of -(6496.00 +/- 0.73) kJ mol(-1) for MgSO4-5MgO-7H(2)O and -(6800.17 +/- 0.55) kJ mol(-1) for MgSO4 . 5MgO-8H(2)O were obtained by using the standard molarenthalpies of formation of MgO(S), MgSO4 . 7H(2)O(s) and H2O(l). The standard molar entropies of formation of MgSO4- 5MgO . 7H(2)O and MgSO4 . 5MgO . 8H(2)O were calculated from the thermodynamic relation with the standard molar Gibbs free energy of formation Of MgSO4-5MgO-7H(2)O and MgSO4-5MgO-8H(2)O computed from a group contribution methods. (C) 2002 Elsevier Science B.V All rights reserved.
引用
收藏
页码：237 / 240
页数：4
相关论文
共 50 条
  • [41] FLOW OF HELIUM INTO MICROSPACES OF MAGNESIUM OXYSULFATE CEMENT PASTE
    BEAUDOIN, JJ
    FELDMAN, RF
    CEMENT AND CONCRETE RESEARCH, 1977, 7 (05) : 585 - 596
  • [42] Modification of Magnesium Oxysulfate Cement by Incorporating Weak Acids
    Qin, Ling
    Gao, Xiaojian
    Li, Wengui
    Ye, Huan
    JOURNAL OF MATERIALS IN CIVIL ENGINEERING, 2018, 30 (09)
  • [43] Magnesium Oxychloride and Magnesium Oxysulfate Cements as Temporary Plugging Agents in Geothermal Drilling
    Yan, Liangliang
    Pang, Shaocong
    Dong, Haiyan
    Zheng, Xiuhua
    An, Yuxiu
    ACS OMEGA, 2023, 9 (02): : 2696 - 2706
  • [44] Preparation of Magnesium Oxysulfate Cement with Calcined Phosphate Tailings
    Gu, Kang
    Lang, Lei
    Li, Desheng
    Chen, Bing
    JOURNAL OF MATERIALS IN CIVIL ENGINEERING, 2022, 34 (12)
  • [45] Study on water resistance modification of magnesium oxysulfate cement
    Hao, Yafei
    Li, Chao
    Zhao, Fengqing
    2ND INTERNATIONAL CONFERENCE ON FRONTIERS OF MATERIALS SYNTHESIS AND PROCESSING, 2019, 493
  • [46] Study on hydrothermal crystallization kinetics of magnesium oxysulfate nanowires
    Nai X.
    Wu P.
    Cheng Y.
    Xiao J.
    Liu X.
    Dong Y.
    Huagong Xuebao/CIESC Journal, 2022, 73 (07): : 3038 - 3044
  • [47] Effects of inert silica powder on the properties of magnesium oxysulfate cement
    Zhang, Na
    Yu, Hongfa
    Ma, Haiyan
    Liu, Ting
    Wu, Chengyou
    ADVANCES IN CEMENT RESEARCH, 2021, 33 (06) : 239 - 248
  • [48] Study of untreated phosphogypsum as a fine aggregate for magnesium oxysulfate cement
    Wei, Zhiming
    Chen, Bing
    Gu, Kang
    Yang, Zhengxian
    CONSTRUCTION AND BUILDING MATERIALS, 2023, 365
  • [49] Preparation and characterization of magnesium oxysulfate whiskers/natural rubber composites
    Chen X.
    He H.
    Jian L.
    Yang F.
    Chen, Xi (chenxi602261370@163.com), 2018, Beijing University of Aeronautics and Astronautics (BUAA) (35): : 3137 - 3145
  • [50] Compressive strength and water resistance of magnesium oxysulfate (MOS) cement incorporating magnesium slag
    Wang, Dezhi
    Jin, Kairong
    Wang, Nan
    Zhang, Haiwei
    Wang, Jinghui
    Zhou, Xiangming
    CONSTRUCTION AND BUILDING MATERIALS, 2024, 453
12345