Thermodynamıc Propertıes of the BiTe and Bi8Te9 Compounds

Two-phase alloys Bi8Te9+Bi4Te5 and BiTe+Bi8Te9 were studied by the electromotive forces method (EMF) in the temperature range 300-450 K. From the EMF data, the relative partial molar functions of bismuth in the alloys were calculated. The potential-forming reactions responsible for these partial functions were compiled, the values of the standard thermodynamic functions of formation, and the standard entropies of Bi8Te9 and BiTe compounds were calculated. A comparative analysis of the data for BiTe with the literature data was carried out; for Bi8Te9, the thermodynamic functions were obtained for the first time.

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Thermodynamic study of the thallium-thulium tellurides by EMF method

Bulletin of the Karaganda University Chemistry series ◽

10.31489/2021ch2/43-52 ◽

2021 ◽

Vol 102 (2) ◽

pp. 43-52

Author(s):

S.Z. Imamaliyeva ◽

◽

I.F. Mekhdiyeva ◽

Y.I. Jafarov ◽

M.B. Babanly ◽

...

Keyword(s):

Phase Equilibria ◽

Thermodynamic Functions ◽

Solid Phase ◽

Electrochemical Cells ◽

X Ray Diffraction ◽

Partial Functions ◽

Standard Thermodynamic Functions ◽

Phase Equi ◽

First Time ◽

Thermodynamic Functions Of Formation

In this study the phase equilibria in the Tl2Te–Tl2Te3–TlTmTe2compositions area of the Tl–Tm–Te ternary system were studied by powder X-ray diffraction (PXRD) analysis. Based on PXRD data, the solid-phase equi-libria diagram was plotted. The thermodynamic functions of the Tl9TmTe6and TlTmTe2ternary compounds were calculated by the electromotive forces method. The electrochemical cells of the following type (−) TmТе (s.) | glycerol + KCl + TmCl3 | (Tm in alloys of Tl–Tm–Te system) (s.) (+) were assembled and their EMF were measured in the 300-450 Ktemperature range. Based on obtained EMF data for the Tl2Te3–TlTe–TlTmTe2and TlTe–TlTmTe2–Tl9TmTe6three-phase regions, the relative partial thermodynamic functions of TmTe in alloys were calculated. The combination of these functions with the partial molar functions of thulium in TmTe allowed calculating the corresponding partial functions of thulium in the above phase regions. The potential-forming reactions responsible for the indicated partial molar values were obtained based on con-structed solid-phase equilibria diagram. Using indicated potential-forming reactions, for the first time, the standard thermodynamic functions of formation and standard entropies of the Tl9TmTe6and TlTmTe2 compounds were calculated.

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THERMODYNAMIC PROPERTIES OF THE Sb2Te3 COMPOUND

Azerbaijan Chemical Journal ◽

10.32737/0005-2531-2021-4-53-59 ◽

2021 ◽

Vol 0 (4) ◽

pp. 53-59

Author(s):

F.R. Aliyev ◽

◽

E.N. Orujlu ◽

D.M. Babanly ◽

◽

...

Keyword(s):

Comparative Analysis ◽

Thermodynamic Properties ◽

Thermodynamic Functions ◽

Electromotive Force ◽

Liquid Electrolyte ◽

Emf Measurements ◽

Temperature Range ◽

First Time

Thermodynamic properties of the Sb2Te3 compound were studied by measuring electromotive force (EMF) with a liquid electrolyte in the temperature range of 300-450 K. The partial molar functions of antimony in alloys and the corresponding standard integral thermodynamic functions of the Sb2Te3 compound were calculated for the first time based on the EMF measurements under standard conditions. Comparative analysis of obtained results with literature data was carried out

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Thermodynamic properties of the GdTe3 compound

Фізика і хімія твердого тіла ◽

10.15330/pcss.22.3.420-425 ◽

2021 ◽

Vol 22 (3) ◽

pp. 420-425

Author(s):

Samira Imamaliyeva

Keyword(s):

Thermodynamic Properties ◽

Thermodynamic Functions ◽

Standard Entropy ◽

X Ray Diffraction ◽

Emf Measurements ◽

Standard Thermodynamic Functions ◽

X Ray ◽

Temperature Range ◽

Concentration Cells ◽

Thermodynamic Functions Of Formation

The alloys of the Gd-Te system in the range of compositions > 75 at% Te were studied by the methods of X-ray diffraction (XRD) and electromotive forces (EMF). From the EMF measurements of the concentration cells relative to the GdTe electrode in the 300-450 K temperature range, the partial thermodynamic functions of GdTe in alloys were determined. By combining these data with the corresponding functions of Gd in GdTe, the partial molar functions of gadolinium in GdTe3+Te alloys, and standard thermodynamic functions of formation and standard entropy of the GdTe3 compound were calculated. The obtained results were compared with the literature data.

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Thermodynamic study of a synthetic analog of the famatinite mineral - Cu3SbS4

Фізика і хімія твердого тіла ◽

10.15330/pcss.22.1.53-58 ◽

2021 ◽

Vol 22 (1) ◽

pp. 53-58

Author(s):

P.R. Mammadli ◽

L.F. Mashadiyeva ◽

Z.T. Hasanova ◽

D.M. Babanly

Keyword(s):

Thermodynamic Functions ◽

Measurement Data ◽

Phase Region ◽

S Phase ◽

Synthetic Analog ◽

Standard Entropy ◽

Emf Measurements ◽

Standard Thermodynamic Functions ◽

First Time ◽

Thermodynamic Functions Of Formation

Fundamental thermodynamic properties of the synthetic analog of the famatinite mineral - Cu3SbS4 were studied on the basis of electromotive force (EMF) measurements. The EMF of the concentration chains relative to the Cu electrode with a solid electrolyte was measured for the alloys from the Cu3SbS4 + Sb2S3 + S phase region at 300-380K temperature interval. Based on measurement data, the relative partial thermodynamic functions of copper in alloys, the standard thermodynamic functions of formation, as well as, the standard entropy of the Cu3SbS4 ternary compound were calculated for the first time.

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THERMODYNAMIC FUNCTIONS OF FORMATION OF LITHIUM TITANATES

Azerbaijan Chemical Journal ◽

10.32737/0005-2531-2021-4-60-66 ◽

2021 ◽

Vol 0 (4) ◽

pp. 60-66

Author(s):

U.N. Sharifova ◽

Keyword(s):

Free Energy ◽

Enthalpy Of Formation ◽

Thermodynamic Functions ◽

Standard Entropy ◽

Standard State ◽

Temperature Range ◽

Lithium Glass ◽

Binary Compounds ◽

First Time ◽

Thermodynamic Functions Of Formation

By the method of electromotive forces measuring concentration chains: Pt│Li2O│ ZrO2+10 wt% Y2O3, lithium glass. (Li2O)x(TiO2)1-x│Pt in the temperature range T=1000–1200K and concentrations 0.35÷0.95 mol fraction TiO2, the thermodynamic functions of the formation of the compounds Li4TiO4, Li2TiO3, Li4Ti5O12 and phases based on Li2TiO3:Li1.92Ti1.04O3.04, Li2.12Ti0.94O2.92 were determined. With the exception of the compound Li2TiO3, the thermodynamic functions of the formation of lithium titanates are deter¬mined for the first time. The thermodynamic functions of formation are calculated for the 1200 K and for the standard state at 298 K. The thermodynamic functions of the formation of lithium titanates are determined from simple substances and from binary compounds Li2O and TiO2. In particular, for the free energy, enthalpy of formation and standard entropy we obtained: ∆G_298^0(Li4TiO4)=–2149 kJ∙mol-1; ∆G_298^0(Li2TiO3)=–1565; ∆G_298^0(Li4Ti5O12)=–5923; ∆H_298^0(Li4TiO4)=–2286 kJ∙mol-1; ∆H_298^0(Li2TiO3)=–1662; ∆H_298^0(Li4Ti5O12)=–6287; S_298^0(Li4TiO4)=119.1 J∙mol-1∙K-1; S_298^0(Li2TiO3)=84; S_298^0(Li4Ti5O12)=315.7

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Electrochemical and thermodynamic properties of U4+ and U3+ on Mo electrode in LiCl-KCl eutectic

Radiochimica Acta ◽

10.1515/ract-2017-2898 ◽

2019 ◽

Vol 107 (2) ◽

pp. 95-104

Author(s):

Ru-Shan Lin ◽

You-Qun Wang ◽

Zhao-Kai Meng ◽

Hui Chen ◽

Yan-Hong Jia ◽

...

Keyword(s):

Free Energy ◽

Thermodynamic Properties ◽

Thermodynamic Functions ◽

Electrochemical Behavior ◽

Diffusion Coefficients ◽

Electrochemical Techniques ◽

Reduction Process ◽

Standard Potential ◽

Hcl Gas ◽

Thermodynamic Functions Of Formation

Abstract In this study, UCl4 was prepared by the reaction of HCl gas with UO2 in the LiCl-KCl eutectic. Then, the electrochemical behavior of U4+ and U3+ on a Mo cathode was investigated by various electrochemical techniques. The reduction process of U4+ was regarded as two steps: U4++e=U3+; U3++3e=U. Diffusion coefficients of U4+ and U3+, the apparent standard potential of U4+/U3+, U3+/U as well as U4+/U in the LiCl-KCl molten salt on the Mo electrode was determined by numerous electrochemical methods. The thermodynamic functions of formation of Gibbs free energy of UCl4 and UCl3 are calculated as well.

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Heat Capacities and Thermodynamic Properties of Hungchaoite and Mcallisterite

Molecules ◽

10.3390/molecules24244470 ◽

2019 ◽

Vol 24 (24) ◽

pp. 4470

Author(s):

Jiangtao Song ◽

Fei Yuan ◽

Long Li ◽

Yafei Guo ◽

Tianlong Deng

Keyword(s):

Phase Transition ◽

Thermodynamic Properties ◽

Thermodynamic Functions ◽

Process Design ◽

Chemical Engineering ◽

Heat Capacities ◽

Salt Lakes ◽

Engineering Process ◽

Thermal Anomalies ◽

First Time

The heat capacities on two minerals of hungchaoite (MgB4O7·9H2O, Hu) and mcallisterite (MgB6O10·7.5H2O, Mc) have been measured with a precision calorimeter at temperatures ranging from 306.15 to 355.15 K, experimentally. It was found that there are no phase transition and thermal anomalies, and the molar heat capacities against temperature for the minerals of hungchaoite and mcallisterite were fitted as C p , m , Hu = − 27019.23675 + 229.55286 T − 0.63912 T 2 + ( 5.95862 × 10 − 4 ) T 3 and C p , mMc = − 9981.88552 + 84.10964 T − 0.22685 T 2 + ( 2.0593 × 10 − 4 ) T 3 , respectively. The molar heat capacities and thermodynamic functions of (HT-H298.15), (ST-S298.15), and (GT-G298.15) at intervals of 1 K for the two minerals were obtained for the first time. These results are significant in order to understand the thermodynamic properties of those minerals existing in nature salt lakes, as well as applying them to the chemical engineering process design.

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Heat Capacity and Thermodynamic Properties of LaBr3 at 300 – 1100 K

Zeitschrift für Naturforschung A ◽

10.1515/zna-2004-1117 ◽

2004 ◽

Vol 59 (11) ◽

pp. 825-828

Author(s):

L. Rycerz ◽

E. Ingier-Stocka ◽

B. Ziolek ◽

S. Gadzuric ◽

M. Gaune-Escard

Keyword(s):

Differential Scanning Calorimetry ◽

Heat Capacity ◽

Thermodynamic Properties ◽

Temperature Dependence ◽

Enthalpy Of Formation ◽

Thermodynamic Functions ◽

Molar Enthalpy ◽

Standard Molar Enthalpy ◽

Scanning Calorimetry ◽

Temperature Range

The heat capacity of solid and liquid LaBr3 was measured by Differential Scanning Calorimetry (DSC) in the temperature range 300 - 1100 K. The obtained results were fitted by a polynomial temperature dependence. The enthalpy of fusion of LaBr3 was also measured. By combination of these results with the literature data on the entropy, S0m (LaBr3, s, 298.15 K) and the standard molar enthalpy of formation, ΔformH0m (LaBr3, s, 298.15 K), the thermodynamic functions of lanthanum tribromide were calculated up to 1300 K

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Thermodynamic properties of the liquid Hg-Tl alloys determined from vapour pressure measurements

Journal of Mining and Metallurgy Section B Metallurgy ◽

10.2298/jmmb0204237g ◽

2002 ◽

Vol 38 (3-4) ◽

pp. 237-247 ◽

Cited By ~ 2

Author(s):

W. Gierlotka ◽

K. Fitzner ◽

M. Sukiennik

Keyword(s):

Thermodynamic Properties ◽

Activity Coefficients ◽

Thermodynamic Functions ◽

Vapour Pressure ◽

Pressure Measurements ◽

Temperature Range ◽

Liquid Solutions ◽

Partial Vapour Pressure

The partial vapour pressure of mercury over liquid Hg-Tl liquid solutions were determined in the temperature range from 450 to 700 K by direct vapour pressure measurements carried out with the quartz gauge. From the measured ln pHg vs. T relationships activities of mercury were determined. Using Redlich-Kister formulas logarithms of the activity coefficients were described with the following equations: From which all thermodynamic functions in the solutions can be derived.

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