کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
673363 1459504 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of temperature on the process of complex formation crown ether 15C5 with Na+ in the (water + ethanol) mixture at temperatures from (293.15 to 308.15) K
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Effect of temperature on the process of complex formation crown ether 15C5 with Na+ in the (water + ethanol) mixture at temperatures from (293.15 to 308.15) K
چکیده انگلیسی


• The system 15C5/Na+ complex + water + ethanol has been investigated.
• The thermodynamic functions of 15C5/Na+ complex formation were calculated.
• The enthalpy of complex formation has been calculated using calorimetric method.
• The enthalpy of complex formation has been calculated from van’t Hoff's equation.
• The obtained results have been compared.

Thermodynamic functions of complex formation of 15-crown-5 ether (15C5) with sodium cation (Na+) in the mixtures of water (W) with ethanol (EtOH) at different temperatures have been calculated. To obtain this function two experimental methods have been used. The equilibrium constants of complex formation have been determined by conductivity measurements and the enthalpic effect of complex formation has been measured by the calorimetric method and has been also calculated using van’t Hoff's equation. The obtained results were compared and discussed. The complexes are enthalpy stabilized but entropy destabilized.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thermochimica Acta - Volume 580, 20 March 2014, Pages 13–19
نویسندگان
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