Thermodynamic Study of the NaCl+CaCl2+H2O Mixed System by EMF Measurements at Different Temperatures

1999 ◽  
pp. 462-463 ◽  
Author(s):  
H. R. Galleguillos ◽  
F. Hernández-Luis ◽  
L. Fernández-Mérida ◽  
Miguel A. Esteso
1997 ◽  
Vol 101 (8) ◽  
pp. 1136-1145 ◽  
Author(s):  
Felipe Hernández-Luis ◽  
Luis Fernández-Mérida ◽  
Miguel A. Esteso ◽  
Héctor R. Galleguillos-Castro

1999 ◽  
Vol 23 (8) ◽  
pp. 462-463
Author(s):  
H. R. Galleguillos ◽  
F. Hernandez-Luis ◽  
L. Fernández-Mérida ◽  
Miguel A. Esteso

Activity coefficients for NaCI in the NaCI + CaCI2 + H2O ternary system are determined from emf measurements of galvanic cells at 15, 25, 35 and 45 °C. The experimental data were analysed using the Harned, Scatchard and Pitzer treatments.


2009 ◽  
Vol 41 (9) ◽  
pp. 1016-1019 ◽  
Author(s):  
Man-Cheng Hu ◽  
Wei-Jian Zhang ◽  
Shu-Ni Li ◽  
Quan-Guo Zhai ◽  
Yu-Cheng Jiang ◽  
...  

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Dunya Mahammad Babanly ◽  
Qorkhmaz Mansur Huseynov ◽  
Ziya Saxaveddin Aliev ◽  
Dilgam Babir Tagiyev ◽  
Mahammad Baba Babanly

The solid-phase diagram of the Tl-TlBr-S system was clarified and the fundamental thermodynamic properties of Tl6SBr4 compound were studied on the basis of electromotive force (EMF) measurements of concentration cells relative to a thallium electrode. The EMF results were used to calculate the relative partial thermodynamic functions of thallium in alloys and the standard integral thermodynamic functions (-ΔfG0, -ΔfH0, and S0298) of Tl6SBr4 compound. All data regarding thermodynamic properties of thallium chalcogen-halides are generalized and comparatively analyzed. Consequently, certain regularities between thermodynamic functions of thallium chalcogen-halides and their binary constituents as well as degree of ionization (DI) of chemical bonding were revealed.


2021 ◽  
pp. 118172
Author(s):  
Rossember E. Cárdenas ◽  
Claudia Patricia Ortiz ◽  
William E. Acree Jr ◽  
Abolghasem Jouyban ◽  
Fleming Martínez ◽  
...  

2014 ◽  
Vol 59 (3) ◽  
pp. 672-677 ◽  
Author(s):  
Jun Zhang ◽  
Hairui Yao ◽  
Chengxuan Li ◽  
Xigang Du ◽  
Xiaokang Bai ◽  
...  

1987 ◽  
Vol 65 (12) ◽  
pp. 2843-2848
Author(s):  
Sibaprasad Rudra ◽  
Himansu Talukdar ◽  
Kiron K. Kundu

Standard free energies [Formula: see text] and entropies [Formula: see text] of transfer of hydrogen bromide and iodide from water to the aqueous 1, 2, and 4 m of sodium nitrate have been determined by measuring the emf's of the cell: Pt, H2(g, 1 atm)/KOH(m1), KX(m2), solvent/AgX–Ag where X = Br or I at five equidistant temperatures ranging from 15–35°C. [Formula: see text] values of HBr, HI as well as that of HCl obtained from earlier paper and particularly of the individual ions [Formula: see text](i), obtained by use of modified TATB assumption reported earlier and also [Formula: see text](i) obtained after correcting for "cavity" effect and Born-type electrostatic effect estimated tentatively by the scaled particle theory (SPT) and simple Bom equation, respectively, reveal the relative order of stabilisation of Cl−, Br−, and I− ions. Analysis of [Formula: see text]–composition profile (X = Cl, Br, and I) exhibits a characteristic "maxima" around 1.5 m NaNO3 with the relative order HI > HBr > HCl in the region of maxima. Moreover, dissection of [Formula: see text] values into the individual ion contributions by use of the modified TATB assumption reported earlier, results in the characteristic "maxima" around 1.5 m NaNO3 in [Formula: see text] or [Formula: see text]–composition profiles for H+ and "minima" for Cl−, Br−, and I−. The results are discussed in terms of ion–ion–solvent interactions as well as the structural changes of the solvents.


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