An insight into the thermodynamic investigation of important metabolite(KCl)-methyl nicotinate in aqueous solution at various temperatures

Abstract

We report in this communication, the data on density and speed of sound measurements for methyl nicotinate in aqueous and in 0.1 mol.kg−1 aqueous potassium chloride solutions and potassium chloride (KCl) in water and in mixture containing fixed concentration (0.1 mol.kg−1) of Methyl nicotinate (MN) solution and varying the concentration (0.01 mol.kg−1 to 0.16 mol.kg−1) at 288.15, 293.15, 298.15, 303.15, 308.15, 313.15 and 318.15 K and atmospheric pressure. The density data are used to measure apparent molar volume of solute at finite concentrations(Vϕ) and apparent molar volume of solute at infinitely dilute solutions (Vϕ0) in binary and ternary mixtures. The speed of sound data are used to measure isentropic compressibility (κS), apparent molar isentropic compressibility of solute at finite concentrations (KS,ϕ) and apparent molar compressibility of solute at infinitely dilute solutions (KS,ϕ0) for binary and ternary mixtures . The coefficient of thermal expansion (α), apparent molar expansivity of solute (Eϕ) and limiting apparent molar expansivity (Eϕ0) of solute for binary and ternary solutions at 293.15, 298.15, 303.15, 308.15 and 313.15 K have also been measured. These parameters are being used to assist in the exploration of feasible intermolecular interactions in studied binary and ternary mixtures. The structure making/breaking ability of solute in binary and ternary solutions were also examined using Hepler's constant. All these results are analyzed and discussed on the basis of solute–solute and solute–solvent interactions.

Keywords

• Potassium Chloride
• Methyl nicotinate
• Limiting apparent molar volume
• Limiting apparent molar compressibility
• Limiting apparent molar expansivity