Densities of hydrochloric, hydrobromic, hydriodic, and perchloric acids from 25 to 75.degree.C at 1 atm

Apparent molar heat capacities and volumes of LaCl3(aq), La(ClO4)3(aq), and Gd(ClO4)3(aq) between the temperatures 283 K and 338 K

“…The approach works well for activity coefficients, (29) but may be less effective for enthalpy, (28) heat capacity, and volume. Equations (3) to (8) (30) and that of ClO ,aq)} calculated from our results for LaCl 3 (aq) and La(ClO 4 ) 3 (aq) agree well with those calculated from results for HCl(aq) and HClO 4 (aq) reported by Pogue (30) and Herrington et al (31) Temperature-dependent values for C (18,21) and by Pogue and Atkinson. (30) There are significant differences between these two sets.…”

“…Comparison of the differences in V°2 for Cl − (aq) and ClO − 4 (aq) from different sources. w, calculated from V°2 (HCl,aq) (30) and V°2 (HClO4,aq) (30) ; r, calculated from V°2 (HCl,aq) (30) and V°2 (HClO4,aq) (31) ; q, calculated from V°2 (LaCl3,aq) and V°2 (La(ClO4)3,aq), this work. (13) and C°p,2(NaClO4,aq); (32) r, calculated from C°p,2(HClO4,aq) (18) and C°p,2(HCl,aq) (21) ; q, calculated from C°p,2(HClO4,aq) (30) and C°p,2(HCl,aq) (30) .…”

Volumes and heat capacities of aqueous solutions of hydrochloric acid at temperatures from 298.15 K to 623 K and pressures to 28 MPa

“…It is apparent that all results are within their stated uncertainties except for DC°p ,m at T = 298.15 K, where our value is supported by other investigators. (45,47) The DV°m values calculated directly from density measurements appear to be more reliable (based on uncertainties) than those obtained by differentiation of K w results using equation (20). Agreement with DV°m and DC°p ,m values selected by Marshall and Franck (45) and Chen et al (47) is also good except for the highest temperatures, where …”

“…(9) Parameters q 1 to q 20 were determined by a weighted least-squares fit of equations (6), (7), (9), (10), and (11) to the experimental results (446 points) from tables 1 and 2. The equations were optimized by repeated least-squares regression in order to eliminate redundant parameters that were not significant at the 95 per cent confidence (6) ; (16) q, Goldsack and Franchetto; (17) r, Allred and Woolley; (18) W, Dunn; (14) R, Wirth; (12) T, Redlich and Bigeleisen; (13) 8, Äkerlo¨f and Teare; (11) y, Herrington et al; (20) u, Hershey et al (19) (b), 373 K E T E 573 K: w, present results at p = 10 MPa; r, present results at p = 28 MPa.…”

Effects of pressure on aqueous chemical equilibria at subzero temperatures with applications to Europa

“…For acids, we largely relied on the International Critical Tables (ICT, 1928). At least for hydrochloric acid, we were able to verify that these acid data are sound by comparing them to more recent data (Hershey et al, 1984;Herrington et al, 1985).…”