کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
216529 | 1426275 | 2011 | 8 صفحه PDF | دانلود رایگان |
Density data for dilute aqueous solutions of four cyclic ketones (cyclopentanone, cyclohexanone, cycloheptanone, and cyclohexane-1,4-dione) are presented together with standard molar volumes (partial molar volumes at infinite dilution) calculated from the experimental data. The measurements were performed at temperatures from T = 298 K up to T = 573 K. Experimental pressures were close to the saturated vapor pressure of water, and (15 and 30) MPa. The data were obtained using a high-temperature high-pressure flow vibrating-tube densimeter. Experimental standard molar volumes were correlated as a function of temperature and pressure using an empirical polynomial function. Contributions of the molecular structural segments (methylene and carbonyl groups) to the standard molar volume were also evaluated and analyzed.
Research highlights
► In this study we examine standard molar volumes of aqueous cyclic ketones.
► State parameters of measurements were (298 to 573) K and pressures up to 30 MPa.
► Differences in behavior of monoketones and cyclohexane-1,4-dione were observed.
► Group contribution method was designed and examined.
Journal: The Journal of Chemical Thermodynamics - Volume 43, Issue 7, July 2011, Pages 1028–1035