Isobaric specific heat capacity of water and aqueous cesium chloride solutions for temperatures between 298 K and 370 K at p = 0.1 MPa |
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| Institution: | 1. Universidad del Tolima, Facultad de Ciencias, Departamento de Química, Barrio Santa Helena Parte Alta, Ibagué, Colombia;2. Universidad Nacional de Colombia, Facultad de Ciencias, Departamento de Química, Departamento de Química, Avenida Carrera 30 No. 45-03, Bogotá, Colombia;3. Universidad de los Andes, Facultad de Ciencias, Departamento de Química, Carrera 1 No. 18 A 10, Bogotá, Colombia;1. Departament de Física, Universitat Autònoma de Barcelona, 08193 Bellaterra, Catalonia, Spain;2. Institut d’Estudis Catalans, Carme 47, Barcelona 08001, Catalonia, Spain;3. Department of Mathematics, Computer Science and Economics, University of Basilicata, Campus Macchia Romana, 85100 Potenza, Italy;1. School of Physics Science and Technology, Nanjing Normal University, Nanjing 210023, PR China;2. School of Electronics and Information Engineering, Hengshui University, Hengshui 053000, PR China;3. Department of Physics, College of Science, Nanjing Agricultural University, Nanjing 210095, PR China |
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| Abstract: | There has been some controversy regarding the uncertainty of measurements of thermal properties using differential scanning calorimeters, namely heat capacity of liquids. A differential scanning calorimeter calibrated in enthalpy and temperature was used to measure the isobaric specific heat capacity of water and aqueous solutions of cesium chloride, in the temperature range 298 K to 370 K, for molalities up 3.2 mol · kg?1, at p = 0.1 MPa, with an estimated uncertainty (ISO definition) better than 1.1%, at a 95% confidence level. The measurements are completely traceable to SI units of energy and temperature.The results obtained were correlated as a function of temperature and molality and compared with other authors, obtained by different methods and permit to conclude that a DSC calibrated by Joule effect is capable of very accurate measurements of the isobaric heat capacity of liquids, traceable to SI units of measurement. |
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