کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
216510 | 1426292 | 2010 | 10 صفحه PDF | دانلود رایگان |
Density data for dilute aqueous solutions of two amino acids (glycine, l-alanine) obtained using a flow vibrating-tube densimeter are presented together with partial molar volumes at infinite dilution (standard molar volumes, Vm,2∘) calculated from the measured data. The experiments were performed at temperatures from (298 up to 443) K at pressures close to the saturation line of water, at pressures in the range from (15 to 17) MPa, and at 30 MPa. Values of an analogue of isothermal compressibility, κT,2∘=-(1/Vm,2∘)(∂Vm,2∘/∂p)T, are also evaluated. Maxima on the curves Vm,2∘(T) and κT,2∘(T) are observed and discussed. The new data along with literature values of standard molar volumes and heat capacities are used for generating the recommended parameterization of an equation of state for standard molar thermodynamic properties of the aqueous amino acids.
Journal: The Journal of Chemical Thermodynamics - Volume 42, Issue 2, February 2010, Pages 198–207