Study of Viscous Behavior for Amino Acid L- Glutamine Aqueous N,N Dimethyl Formamide Solution at Different Temperatures

Mahdi, Suhair Abdulhadi; Farhan, Ahlam Mohammed

doi:10.21608/ejchem.2021.41180.2834

Study of Viscous Behavior for Amino Acid L- Glutamine Aqueous N,N Dimethyl Formamide Solution at Different Temperatures

Document Type : Original Article

Authors

¹ Department of Chemistry, College of Science, University of Al-Mustansiriyah, Baghdad, Iraq

² Department of Chemistry, College of science for Women, University of Baghdad, Baghdad, Iraq

10.21608/ejchem.2021.41180.2834

Abstract

The densities () and kinematic viscosities (ν) which was converted to the absolute viscosity () from the product of the kinematic viscosity and the density of L-Glutamine have been measured at different temperatures 298.15, 303.15 and 313.15K in aqueous 20% (w/w) dimethyl formamide (DMF) under atmospheric pressure. The value of apparent molar volume (v), limiting apparent molar volume (v ͦ ) and viscosity data have been analyzed by using Jones-Dole equation, the Jones-Dole coefficients (A and B) were calculated and excess Gibbs free energy of activation of viscous flow (〖〗^) has been obtained to throw light on the mechanism of viscous flow. The results were interpreted strong ion-solvent interactions in these systems and also structure-maker in 20% DMF + 80% water mixed solvents.

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