Densities, Molar Volumes, Thermal Expansion Coefficients, and Isothermal Compressibilities of Organic Acids from 293.15 K to 323.15 K and at Pressures up to 25 MPa

Abstract

Densities of seven straight-chain organic acids, including acetic acid, propanoic acid, butanoic acid, pentanoic acid, hexanoic acid, heptanoic acid, and octanoic acid, have been measured by using a vibrating-tube densimeter in the temperature range from 293.15 K to 323.15 K and pressure range from 0.1 MPa to 25.0 MPa. Molar volumes of these organic acids have been obtained from the measured densities and fitted to polynomials as a function of temperature and pressure. Thermal expansion coefficients and isothermal compressibilities have been derived as a function of temperature and pressure.

Solubility of Syngas Components in Water, Acetic Acid, and Alcohol Using New Standard Fugacity Methodology

“…(A29) to the density and to the isothermal compressibility data reported in 46 and 47 ; and for acetic acid was obtained by fitting Appendix A, Eq. (A1) only to the isothermal density datasets reported in 48 . Table 5: Coefficients for the AspenTech extended Antoine equation 26 , Eq.…”

Estimation of Excess Properties of Binary Liquids Systems of Tetrahydrofurfuryl Alcohol with Short-Chain Carboxylic Acids at 298.15 K

“…The source and purity of chemical compounds used in this study are shown in Table-1 along with experimental measurements of viscosity, density and refractive index, as well as values obtained from other researchers [11][12][13][14][15][16][17][18][19]. All the chemicals and regeants were used without further purification.…”

Density, speed of sound, and refractive index measurements for the binary systems (butanoic acid+propanoic acid, or 2-methyl-propanoic acid) at T=(293.15 to 313.15)K

“…http://dx.doi.org/10.1016/j.jct.2012.07.019 are given in table 1. The purity of the solvents were checked by comparing the measured density, speed of sound and refractive index value at various temperature with those reported in literature [5,24,26,[29][30][31][32][33][34][35].The literature and experimental density, speed of sound and refractive index value of pure solvents are given in table 2. The maximum difference between the literature and the experimental density, speed of sound and the refractive index is 0.0005 g Á cm À3 , 3.6 m Á s À1 and 0.0024.…”

“…Accurate knowledge of the thermodynamic properties of carboxylic acid mixtures are also useful for the development of new correlations and/or predictive models [10,11]. The density, speed of sound and refractive index data on carboxylic acid binary mixtures in literature is limited and most of the work have been done with small chain acids at one temperature 298.15 K [12][13][14][15][16][17][18][19][20][21][22][23][24]. There is no speed of sound binary data for carboxylic acid mixtures.…”