Apparent molar volumes, expansibilities, and isentropic compressibilities of selected electrolytes in methanol

Effect of alkyl chain length and temperature on the thermodynamic properties of ionic liquids 1-alkyl-3-methylimidazolium bromide in aqueous and non-aqueous solutions at different temperatures

“…Table 1 also shows that both of density and speed of sound of (ILs + methanol) solutions increase very slightly with increasing alkyl chain length of ILs. The similar behavior (temperature and concentration effect) has also been observed in the case of methanolic solutions of other ILs [12,[50][51][52], sodium bromide [53], tetraphenylphosphonium bromide [53], and polyethylene glycol (PEG) [54].…”

“…The obtained results show that the apparent molar volumes of investigated ILs in methanol are very smaller than those in water. Volumetric studies of methanolic solutions of sodium bromide [53], tetraphenylphosphonium bromide [53], and tetraalkylammonium bromides [55] show that these systems have a similar behavior with ILs. However, it was found that [54,56,57] the apparent molar volumes of polymers (such as PEG400 [54], PEGMA360 [56], and PEGDME250 [57]) in methanol increase by increasing both polymer concentration and temperature.…”

Volumetric and viscometric studies of urea in binary aqueous solutions of glucose at different temperatures

“…As is seen in table 3, the slope S v values for urea for different mass% of glucose at different temperatures are positive, suggesting solute-solute interactions in the system studied, whereas the earlier researchers [11,12] have found a negative slope S v in studying the glycine in binary aqueous sucrose solutions and in some electrolytes in methanol solutions, respectively, due to weak solute-solute interactions. As the present system contains two non-electrolytes in aqueous solution, solute-solvent interaction may be smaller than solute-solute interaction due to the absence of any ion in the solution.…”

“…The negative values of U v indicate the absence or very weak solute-solvent interactions, while the earlier workers[11,12] have found the positive U v values for solute-solvent interactions in their studies of amino acid in binary aqueous sucrose or electrolyte solutions. Perusal of table 3 shows that the U…”

Thermodynamic Properties of Nonaqueous Single Salt Solutions Using the Q-Electrolattice Equation of State

“…(Gmehling, 2012), (C) osmotic coefficient at 298.15 K (○) (Gmehling, 2012), and (D) liquid density at 298.15 K (○) (Pasztor and Criss, 1978). (Takenaka et al, 1994a); b (Glugla et al, 1982); c (Barthel et al, 1998); d (Takenaka et al, 1994b); e (Wawer et al, 2008); f (Takenaka et al, 1994c) (Glugla et al, 1982) …”