Experimental Study of the Excess Molar Enthalpy of Ternary Mixtures Containing Water + (1,2-Propanediol, or 1,3-Propanediol, or 1,2-Butanediol, or 1,3-Butanediol, or 1,4-Butanediol, or 2,3-Butanediol)+Electrolytes at 298.15 K and Atmospheric Pressure

Densities, Viscosities, Refractive Indices, and Excess Properties of Aqueous 1,2-Etanediol, 1,3-Propanediol, 1,4-Butanediol, and 1,5-Pentanediol Binary Mixtures

“…Additionally, the used alkanediols have huge applications in the automotive, aviation, explosive, textile, surface coating, food, cosmetic, pharmaceutical, tobacco, petroleum, and polymer industries. 9,10 A survey of literature shows that numerous studies have been carried out on different thermophysical properties of alkanediol systems. Density measurements of pure 1,2-ethanediol, 1,2-propanediol, and 1,2-butanediol at temperatures from 278.15 to 358.15 K and pressures up to 60 MPa were reported by Atilhan and Aparicio.…”

Experimental study of the excess molar volume of ternary mixtures containing {water+(1,2-propanediol, or 1,3-propanediol, or 1,2-butanediol, or 1,3-butanediol, or 1,4-butanediol, or 2,3-butanediol)+electrolytes} at a temperature of 298.15K and atmospheric pressure

“…According to Checoni and Francesconi [5] the dissolution of alkanediols in aqueous solutions is accompanied by structural enhancement of solution promoted by two kinds of effects: hydrophilic effects, which is the hydrogen bonding among water and hydroxyl groups and hydrophobic effects, which is related to the hydrogen bonding between water molecules, forming a cluster around the non polar surface of a mono alcohol molecule [16]. As a consequence, V E m curves have an unsymmetrical format at the hydroxyl compound dilute region.…”

“…In this way, the molecules and ions arrangement is favored generating an increase in the volumetric contraction. Coefficients A j for fitting equation (5) and the standard deviation r at a temperature of 298.15 K. …”

“…Alkanediols presence results in non-freezing water in aqueous solutions [1] and acts as icing inhibitor in fuel systems [2]; besides, alkanediols act as stabilizing agent of the native state of proteins in aqueous media [3,4]. Experimental studies on excess molar properties, especially excess molar enthalpy ðH E m Þ and excess molar volume ðV E m Þ, are accounted important tools to elucidate both the network and the interactions that occur in the aqueous mixtures due to presence of alkanediols [5]. Furthermore, these studies have been contributed to understand the hydrophobic and hydrophilic effects actuating between the molecules presents in these mixtures [6][7][8][9][10].…”

“…Experimental study of the enthalpic behavior in aqueous mixtures containing alkanediols due to presence of electrolytes were performed by Checoni and Francesconi [5], Taniewska-Osinska and Pietrzac [11,12] and Pietrzac et al [13]. However, studies involving the influence of an electrolyte on V E m of aqueous mixtures, specially containing alkanediols, are inexistent.…”