Excess molar enthalpies and excess molar volumes of (1,3-dimethyl-2-imidazolidinone + an aromatic hydrocarbon) atT = 298.15 K |
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| Institution: | 1. Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, China;2. Key Laboratory of Testing and Evaluation for Aquatic Product Safety and Quality, Ministry of Agriculture and Rural Affairs, Qingdao, 266071, China;3. Diantek Digital Technology (Hangzhou) Co., Ltd., Hangzhou, 310027, China;4. Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266071, China;1. Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, China;2. Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China;1. Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China;2. Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States;3. Beijing Key Laboratory for Advanced Powder Metallurgy and Particulate Materials, University of Science and Technology Beijing, Beijing 100083, China;4. School of Material Science and Engineering, Xiangtan University, Hunan 411105, China;5. Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing 100083, China |
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| Abstract: | Excess molar enthalpies HmEand excess molar volumesVmE of (1,3-dimethyl-2-imidazolidinone + benzene, or methylbenzene, or 1,2-dimethylbenzene, or 1,3-dimethylbenzene, or 1,4-dimethylbenzene, or 1,3,5-trimethylbenzene, or ethylbenzene) over the whole range of compositions have been measured at T = 298.15 K. The excess molar enthalpy values were positive for five of the seven systems studied and the excess molar volume values were negative for six of the seven systems studied. The excess enthalpy ranged from a maximum of 435 J · mol ? 1for (1,3-dimethyl-2-imidazoline + 1,3,5-trimethylbenzene) to a minimum of ? 308 J · mol ? 1for (1,3-dimethyl-2-imidazoline + benzene). The excess molar volume values ranged from a maximum of 0.95cm3mol ? 1 for (1,3-dimethyl-2-imidazoline + ethylbenzene) and a minimum of ? 1.41 cm3mol ? 1for (1,3-dimethyl-2-imidazoline + methylbenzene). The Redlich–Kister polynomial was used to correlate both the excess molar enthalpy and the excess molar volume data and the NRTL and UNIQUAC models were used to correlate the enthalpy of mixing data. The NRTL equation was found to be more suitable than the UNIQUAC equation for these systems. The results are discussed in terms of the polarizability of the aromatic compound and the effect of methyl substituents on the benzene ring. |
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