کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9573321 | 1388896 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Activity coefficients and thermodynamic parameters for RbCl/CsCl + amide (acetamide, propanamide, and n-butanamide) + water system at 298.15 K
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Electromotive force (emf) of the chemical cell without liquid-junction K-ISE | RbCl/CsCl ( mE) | ISE-Cl and K-ISE | RbCl/CsCl (mE), amide (mN) | ISE-Cl, have been measured at 298.15 K, where mE = (0.005 to 0.5) mol kgâ 1 and mN= (0.05 to 3.0) mol kgâ 1. The activity coefficients of RbCl/CsCl in amide (acetamide, propanamide, and n-butanamide) + water mixture can be obtained from these electromotive force data and in the mean time the Gibbs free energy interaction parameters of RbCl/CsCl + amide pair in water, gEN, as well as the salt constant, kS, can be evaluated. The results show that both gEN > 0, kS > 0 at 298.15 K, and all the activity coefficients of electrolyte in amide + water mixture increase with increasing the mN, but it is a little complicated for the dependence of activity coefficients on mE. These thermodynamic parameters were discussed in terms of a model of the structural interaction and electrostatic interaction and the dependence of them on the number of carbon atoms in amide as well as the radius of metal ions were interpreted by the group additivity principle.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biophysical Chemistry - Volume 118, Issue 1, 22 October 2005, Pages 25-30
Journal: Biophysical Chemistry - Volume 118, Issue 1, 22 October 2005, Pages 25-30
نویسندگان
Yucheng Jiang, Mancheng Hu, Peng Fan, Jianji Wang, Kelei Zhuo,