Enthalpies of solution ofN-acetylamino acid amides in aqueous solutions of electrolytes at the temperature 298.15 K

Thermodynamics of solvation of some small peptides in water at T=298.15K

“…Thermodynamic studies on amino acids, peptides, neutral amino acid derivatives and cyclic dipeptides are reported in the literature [3][4][5][6][7][8]. In particular, some thermodynamic properties of N-acetylamino acid amides have been investigated by one of us [9,10].…”

The enthalpies of solution of some dipeptides in aqueous urea mixtures at T=298.15K

“…The water used in the experiments was deionised and distilled twice. The enthalpies of solution were measured in water and in aqueous solutions of urea using an isoperibol calorimeter [14]. The glass calorimetric vessel, with a volume 100 cm 3 , was equipped with two termistors, an electrical heater for calibration, and a stirrer-ampoule sample holder.…”

Determination of the Enthalpy of Solute−Solvent Interaction from the Enthalpy of Solution: Aqueous Solutions of Erythritol and l-Threitol

“…The calorimeter calibration constant was determined from the results obtained for the dissolution of standard potassium chloride − treated according to the recommendation for the purification of this standard substance . The performance of the calorimetric data was ascertained by measuring the enthalpy of solution of sodium chloride (Riedel de Haen, > 99.8 mole percent, dried under reduced pressure at 333 K for a few days) in water at 298.15 K. The mean value obtained for eleven independent determinations covering the concentration range from 0.1 to 0.5 mol kg -1 was Δ sol H ° = (4.26 ± 0.05) kJ mol -1 . This figure is in good agreement with the value published in the literature, Δ sol H ° = 4.2 kJ mol -1 …”