The volumetric and thermochemical properties of YCl3(aq), YbCl3(aq), DyCl3(aq), SmCl3(aq), and GdCl3(aq) at T=(288.15, 298.15, 313.15, and 328.15) K and p=0.1 MPa |
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| Institution: | 1. Mississippi State University, Department of Forestry, 361 Thompson Hall, 775 Stone Blvd., Mississippi State, MS 39762, USA;2. Michigan State University, Department of Forestry, 124 Natural Resources Building, 480 Wilson Rd., East Lansing, MI 48824, USA;3. Northern Research Station, USDA Forest Service, 180 Canfield St., Morgantown, WV 26505, USA;1. Research Center of Magnetic and Electronic Materials, College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, China;2. Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Material Technology & Engineering, Chinese Academy of Science, Ningbo 315201, China;1. Center for Materials for Information Technology, The University of Alabama, Tuscaloosa, AL 35487, United States of America;2. Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, AL 35487, United States of America;3. Department of Electrical and Computer Engineering, The University of Alabama, Tuscaloosa, AL 35487, United States of America;1. School of Materials Science and Engineering, Nanjing Institute of Technology, Nanjing 211167, China;2. Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology, Nanjing 211167, China;3. Xi''an University, Xi''an 710065, China |
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| Abstract: | Relative densities and massic heat capacities have been measured for acidified aqueous solutions of YCl3(aq), YbCl3(aq), DyCl3(aq), SmCl3(aq), and GdCl3(aq) at T=(288.15, 298.15, 313.15, and 328.15) K and p=0.1 MPa. These measurements have been used to calculate experimental apparent molar volumes and heat capacities which, when used in conjunction with Young’s rule, were used to calculate the apparent molar properties of the aqueous chloride salt solutions. The latter calculations required the use of volumetric and thermochemical data for aqueous solutions of hydrochloric acid that have been previously reported in the literature. The concentration dependences of the apparent molar properties have been modeled using Pitzer ion interaction equations to yield apparent molar volumes and heat capacities at infinite dilution. The temperature and concentration dependences of the apparent molar volumes and heat capacities of each trivalent salt system were modeled using modified Pitzer ion interaction equations. These equations utilized the revised Helgeson, Kirkham, and Flowers equations of state to model the temperature dependences of apparent molar volumes and heat capacities at infinite dilution. Calculated apparent molar volumes and heat capacities at infinite dilution have been used to calculate single ion properties for the investigated trivalent metal cations. These values have been compared to those previously reported in the literature. The differences between single ion values calculated in this study and those values calculated from thermodynamic data for aqueous perchlorate salts are also discussed. |
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