عنوان المقالة:الخواص الثرموديناميكية في المزيج الثنائي المكون من التتراهيدرو فيرفول مع بعض الكحولات عند درجة حرارة 298.15 كلفن NOVEL THERMODYNAMIC PROPERTIES OF BINARY MIXTURES OF TETRAHYDROFURFURYL ALCOHOL WITH SOME ALCOHOLS AT 298.15 K
سمير عداي سلمان، سنى عدنان، خليل ابراهيم حسين، ظافر تموين عجيل، احمد محمد عباس
المؤلفون بالإنجليزي
S. A. Salman, S. A. Al-Khfaji, K. I. Hussain, Z.A.Al-Dulaimy, A. M. Abbas and D.T. A. Al-Heetimi
الملخص العربي
To understand the nature of molecular aggregation between two solvents, excess properties (e.g. excess molar volume
(V
), excess Gibb's free energy of activation viscous flow (ΔG*E) and viscosity deviation of binary mixtures) are
therefore needed. Thus, in the current study, the refractive index (nD), viscosity (η), and density (ρ) of binary mixtures
were measured for tetrahydrofurfuryl alcohol (THFA) with ethanol, 2-propanol and 2-butanol at 298.15K. Moreover
and based on experimentally obtained results, the V
, the refractive index deviation (ΔnD), excess molar viscosity (ηE)
and ΔG*E were calculated. To correct and fit the experimental V
, ηE and ΔnD deviations, Redlich-Kister equation
was used. The molecular interaction in binary mixtures was found to explain the variability of physical properties with
the composition of the mixtures. In light of obtained results, factors influencing the molecular interactions (e.g. the
length of the carbon chain and the position of hydroxyl groups in targeted alcohol) have been also discussed. In all
cases the obtained V
, ηE, ΔG*E and ΔnD values were negative at 298.15K except for the binary system (THFA + 2-
butanol) where the results indicate the positive deviation in refractive indices.
زينب عباس حسن | Zainab Abbas Hassan | 3786