Density, Viscosity, and Refractive Index of Formamide, Three Carboxylic Acids, and Formamide + Carboxylic Acid Binary Mixtures

Abstract

Density, viscosity, and refractive index measurements of pure formamide and of formic, acetic, and propionic acids in the temperature range (298.15 to 313.15) K were made. Additionally, measurements of the same properties and in the same temperature range were made on the following mixtures: formamide + (formic acid, or + acetic acid, or + propionic acid). The results were fitted to empirical equations, whose calculated values are in agreement with the experimental ones.

Density, viscosity, isothermal (vapour+liquid) equilibrium, excess molar volume, viscosity deviation, and their correlations for chloroform+methyl isobutyl ketone binary system

“…Equations (5) and (6) (included in table 4) make it possible to predict the density and viscosity of the binary system at any composition as well as temperature over the temperature range (283.15 to 313.15) K, respectively, within its respective standard deviation r. Values calculated with these equations compare well with experimental data, and the standard deviations are similar to those obtained in previous works [17,18].…”

Organic aerosol and global climate modelling: a review

“…The temperature dependence of the refractive index in this wavelength range is reported to be in the order of dn/dT=−5×10 −4 K for all the investigated pure organic components (Bertie and Lan, 1995;El-Kashef, 1998;Li et al, 1994). Various other studies of the refractive index, n(λ), of organic liquids report values at one single wavelength, 590 nm, and some of them are relevant to atmospheric conditions (Aminabhavi et al, 1996;Cases et al, 2001;De Lorenzi et al, 1997;Gomez-Diaz et al, 2001;Ritzoulis and Fidantsi, 2000;Segade et al, 2003). The results from these studies are consistent with the values presented in Fig.…”

“…Several of these studies investigate the refractive index of binary organic liquids (Aminabhavi et al, 1996;Cases et al, 2001;Gomez-Diaz et al, 2001;Segade et al, 2003). Cases et al (2001) investigated mixtures of formamid and 3 carboxylic acids and Segade at al. (2003) investigated the properties of octane mixed with 7 alkanols.…”

An infrared study of pure and ion irradiated frozen formamide

“…• C (liquid) has a density ρ liq = 1.129 g cm −3 and a refractive index of n liq f = 1.446 for the sodium line (0.589 µm) (Cases et al 2001). The corresponding Lorentz-Lorenz coefficient is L = 0.2362 cm 3 g −1 .…”