کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6659718 | 1426191 | 2018 | 106 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Thermodynamics properties of binary mixtures of aqueous solutions of glycols at several temperatures and atmospheric pressure
ترجمه فارسی عنوان
خصوصیات ترمودینامیکی مخلوط دوتایی از محلول های آبی گلیکوول در دماهای مختلف و فشار جوی
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
Densities (Ï), speeds of sound (u) and viscosities (η) for binary mixtures of {waterâ¯+â¯ethanol, orâ¯+â¯ethylene glycol (EG), orâ¯+â¯diethylene glycol (DEG), orâ¯+â¯triethylene glycol (TEG), orâ¯+â¯polyethylene glycol (PEG) 200, orâ¯+â¯polyethylene glycol (PEG) 300, orâ¯+â¯polyethylene glycol (PEG) 400, orâ¯+â¯polyethylene glycol (PEG) 600, orâ¯+â¯glycerol} have been determined as a function of composition at Tâ¯=â¯(293.15, 298.15, 303.15 and 308.15â¯K) and atmospheric pressure. From these results, excess molar volume (VmE), deviation in isentropic compressibility (ÎκS), deviation in viscosity (Îη), and excess Gibbs energy of activation for viscous flow (ÎGâE) were calculated and fitted by the Myers-Scott equation, as a function of mole fraction. Values of VmE and ÎκS were negative over the entire composition range for all mixtures studied. The values of Îη were negative for the systems containing ethylene glycol and glycerol and positive for the systems containing ethanol, PEG 400 and PEG 600. For other systems, the deviation of viscosity presented an S-shape, with negative values at high water concentration. For all mixtures studied, the values of ÎGâE were positive over the entire composition range. The results obtained were discussed in terms of structural effects and intermolecular interactions between like and unlike molecules.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Journal of Chemical Thermodynamics - Volume 122, July 2018, Pages 38-64
Journal: The Journal of Chemical Thermodynamics - Volume 122, July 2018, Pages 38-64
نویسندگان
Heloisa Emi Hoga, Ricardo Belchior Torres, Pedro Luiz Onófrio Volpe,