کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
203596 | 460666 | 2006 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Activity coefficients of the species in the methanol solutions of acetaminophen and two silylated derivatives at 298.15 K
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
An isopiestic method was used to measure the solvent osmotic coefficients in solutions of acetaminophen, triethylsilylacetaminophen and tertiarybuthyldimethylsilylacetaminophen in methanol at 298.15 K. The experimental data for osmotic coefficients have been correlated and solute unsymmetric convention activity coefficients have been calculated using the nonrandom factor (NRF) model, the nonrandom, two-liquid (NRTL) model, a three-parameter Margules equation, and a fourth-order polynomial equation in terms of molality. Standard deviations are least for the models with more parameters, but all models describe the data within experimental uncertainty. The solute activity coefficients are greater than unity, increasing with molecular size.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fluid Phase Equilibria - Volume 249, Issues 1–2, 15 November 2006, Pages 61–66
Journal: Fluid Phase Equilibria - Volume 249, Issues 1–2, 15 November 2006, Pages 61–66
نویسندگان
Jaber Jahanbin Sardroodi, Mohammad Ghaleh Assadi, Mehrdad Mahkam, Yahya Kazemi,