کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
217097 1426315 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Apparent molar volumes and viscosity B-coefficients of nicotinamide in aqueous tetrabutylammonium bromide solutions at T = (298.15, 308.15, and 318.15) K
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Apparent molar volumes and viscosity B-coefficients of nicotinamide in aqueous tetrabutylammonium bromide solutions at T = (298.15, 308.15, and 318.15) K
چکیده انگلیسی

Apparent molar volumes ϕV and viscosity B-coefficients for nicotinamide in (0.00, 0.05, 0.10, and 0.15) mol · dm−3 aqueous tetrabutylammonium bromide (TBAB) solutions have been determined from solution density and viscosity measurements at temperatures over the range (298.15 to 318.15) K as function of concentration of nicotinamide (NA). In the investigated temperature range, the relation: ϕV∘=a0+a1T+a2T2, have been used to describe the temperature dependence of the standard partial molar volumes ϕV∘. These results have, in conjunction with the results obtained in pure water, been used to deduce the standard volumes of transfer ΔϕV∘ and viscosity B  -coefficients of transfer for nicotinamide from water to aqueous TBAB solutions for rationalizing various interactions in the ternary solutions. The structure making or breaking ability of nicotinamide has been discussed in terms of the sign of (δ2ϕV∘/δT2)P. An increase in the transfer volume of nicotinamide with increasing TBAB concentration has been explained by Friedman–Krishnan co-sphere model. The activation parameters of viscous flow for the ternary solutions investigated were also determined and discussed by the application of transition state theory.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Journal of Chemical Thermodynamics - Volume 40, Issue 3, March 2008, Pages 394–400
نویسندگان
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