Additivity Relations of Partial Molal Volumes in Carboxylic Acid Series.

Apparent and partial molar heat capacities and volumes of aqueous adipic acid, l-tartaric acid, and their sodium salts atT= 298.15 K

“…The standard partial molar volumes of adipic acid at T = 298.15 and p o = 0.1 MPa reported by Høiland (6) and Criss and Wood, (19) · mol −1 . In recent years, Apelblat and Manzurola (20,21) determined the apparent molar volumes of several organic acids and their salts at T = 298.15 K over a wide molality range.…”

“…Many studies have been done on the adipate and tartrate systems, but only a few of them focus on the determination of standard partial molar heat capacities and volumes. (6,7) The purpose of the current research is to provide experimental values for the standard partial molar heat capacities C o p,φ and volumes V o φ of the principal adipate and tartrate species in aqueous solution, and changes in standard partial molar heat capacity ( C o p,φ ) and volume ( V o φ ) accompanying the ionization of adipic acid and L-tartaric acid at T = 298.15 K. A study of the effects of temperature from 283.15 K to 523.15 K and pressure at 10 MPa on L-tartaric acid and sodium tartrate will be published in a subsequent paper. (8) …”

Apparent and standard partial molar heat capacities and volumes of aqueous tartaric acid and its sodium salts at elevated temperature and pressure

“…The experimental values of V 2 (H 2 Tar(aq)), V 2 (Na 2 Tar(aq)) and C p;2 (H 2 Tar(aq)) from our measurements at T ¼ 298:15 K were compared with literature values [14][15][16][17][18] in our previous paper [19], and by Patterson and Woolley [20]. Generally, the results for the apparent molar properties agreed to within the combined experimental uncertainties; however, there were some differences in the extrapolations to infinite dilution which are discussed in more detail below.…”

“…Several potentiometric and spectroscopic studies have been done on tartaric acid at ambient temperatures to derive ionization constants and enthalpies of ionization [10][11][12][13]. The apparent molar volumes and heat capacities of tartaric acid and its salts near 298.15 K have been determined by Apelblat and Manzurola [14,15], Sijpkes et al [16], Høiland and Vikingstad [17,18] and by our laboratory [19]. Very recently, Patterson and Woolley [20] reported measurements at temperatures up to 393.15 K. No studies of the standard partial molar properties of tartaric acid or its salts above 393.15 K have been reported in the literature.…”

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

“…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.…”