Apparent molar volumes and apparent molar heat capacities of aqueous D(+)-cellobiose, D(+)-maltose, and sucrose at temperatures from (278.15 to 393.15)K and at the pressure 0.35MPa

A new tool for an old job: Using fixed cell scanning calorimetry to investigate dilute aqueous solutions

“…It is interesting to note that the profiles for the Cu 2+ (aq), Ni 2+ (aq), Zn 2+ (aq), and Mn 2+ (aq) surfaces are nearly co-planar at all T and m, while those for Sr 2+ (aq) and Ba 2+ (aq) show somewhat different behavior at low T, and the surface for Pb 2+ (aq) is somewhat different at all T and m, perhaps reflecting differences in hydration and ion interactions. Figures 13 and 14 show our experimental apparent molar heat capacities C p,/ (T, p = 0.35 MPa, m) for three aqueous 1-alkanols [18,33] and five polyols [25,40,42,54], respectively. Each figure also shows the weighted regression surfaces for each solute obtained using fitting functions of T and m similar to that given in equation (7) [ 18,25,33,40,42,54].…”

“…Figures 13 and 14 show our experimental apparent molar heat capacities C p,/ (T, p = 0.35 MPa, m) for three aqueous 1-alkanols [18,33] and five polyols [25,40,42,54], respectively. Each figure also shows the weighted regression surfaces for each solute obtained using fitting functions of T and m similar to that given in equation (7) [ 18,25,33,40,42,54]. The results in these two figures illustrate the effects that simple differences in the structures of similar solutes can have on the anols in figure 13 are concave, while those of the polyols in figure 14 are convex.…”

“…change in heat capacity for the ionization of water D r C p,m according to equations (8) to (10) [39]; j, Ni 2+ (aq), d = À130 J AE K À1 AE mol À1 [39]; m, Zn 2+ (aq), d = À50 J AE K À1 AE mol À1 [39]; n, Ba 2+ (aq), d = 200 J AE K À1 AE mol À1 [12]; ,, Pb 2+ (aq), d = 120 J AE K À1 AE mol À1 [35]. [25]; maltose (,), d = 0 J AE K À1 AE mol À1 [42]; and (lactose AE 0.94H 2 O) (}), d = 0 J AE K À1 AE mol À1 [40] plotted against temperature T and molality m at p = 0.35 MPa. The surfaces were generated by regression using functions similar to equation (7) [25,40,42,54].…”

“…[25]; maltose (,), d = 0 J AE K À1 AE mol À1 [42]; and (lactose AE 0.94H 2 O) (}), d = 0 J AE K À1 AE mol À1 [40] plotted against temperature T and molality m at p = 0.35 MPa. The surfaces were generated by regression using functions similar to equation (7) [25,40,42,54]. …”

Effect of sodium acetate on the volumetric behaviour of some mono-, di-, and tri-saccharides in aqueous solutions over temperature range (288.15 to 318.15)K

“…The expansion coefficients ð@V 2 =@TÞ P and second derivatives ð@ 2 V 2 =@T 2 Þ p have been calculated by fitting the V 2 results into the following equation: The literature values [7,11,21,22,24,27,28,[30][31][32]35,36,40,41,43] are also included for comparison. Expansibilities have been calculated from the values reported by Woolley and coworkers [31,32,41] and Chalikian [27] using equation (5).…”