Concentration and temperature dependence of surface parameters of some aqueous salt solutions |
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| Institution: | 1. College of Science, China University of Petroleum, Qingdao 266580, Shandong Province, People’s Republic of China;2. Petrolum Production Engineering Research Institute of Huabei Oilfield Company, Renqiu 062552, Hebei Province, People’s Republic of China;3. Key Laboratory of New Energy Physics & Materials Science in Universities of Shandong, Qingdao 266580, Shandong Province, People’s Republic of China;1. Department of Chemical Engineering, Faculty of Chemistry and Pharmacy, Sofia University, Sofia 1164, Bulgaria;2. Unilever R&D, 64 Main Road, Whitefield, Bangalore 560066, India;1. Key Laboratory of Colloid and Interface Chemistry (Ministry of Education), Shandong University, Jinan 250100, PR China;2. National Engineering Technology Research Center for Colloidal Materials, Shandong University, Jinan 250100, PR China;3. School of Physics, Shandong University, Jinan 250100, PR China;1. Group of Research in Applied Thermal Engineering-CREVER, Mechanical Engineering Dept., Spain;2. Analytical and Organic Chemistry Dept., Universitat Rovira i Virgili, Tarragona, Spain;1. Instituto Tecnológico de Aeronáutica, Divisão de Engenharia Eletrônica, São José dos Campos, São Paulo 12228-900, Brazil;2. Universidade Federal da Paraíba, CCEN, Departamento de Química, Caixa Postal 5093, João Pessoa, Paraíba CEP 58051-970, Brazil;3. Universidade Federal da Paraíba, CT, Departamento de Engenharia Química, João Pessoa, Paraíba CEP 58051-900, Brazil;4. Universidade Federal de Pernambuco, Departamento de Engenharia Química, Recife, Pernambuco 50740-521, Brazil |
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| Abstract: | The effect of concentration and temperature on surface tension of aqueous solutions of four different salts has been studied. These include the chloride salts of lithium, sodium, potassium and ammonium. The study was conducted at five different concentrations i.e. 0.1, 0.5, 1.0, 1.5 and 2.0 M, and five different temperatures i.e. 10, 15, 20, 25 and 30 °C. By analyzing the results, the concentration and temperature dependence of surface excess concentration and thermodynamic parameters of surface formation such as enthalpy, entropy, and surface pressure have been calculated. |
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