Solid-gas equilibrium in the binary system lithium iodide-water

1981 ◽  
Vol 46 (13) ◽  
pp. 3157-3165 ◽  
Author(s):  
Jiřina Hejtmánková ◽  
Čestmír Černý ◽  
Luděk Jettmar
Keyword(s):  
Binary System ◽  
Water Vapour ◽  
Temperature Interval ◽  
Thermodynamic Functions ◽  
Dynamic Method ◽  
Heats Of Formation ◽  
Lithium Iodide ◽  
Gibbs Energies ◽  
Flow Apparatus ◽  
The Absolute

An investigation has been made of the equilibria of hydration in the system solid lithium iodide-water vapour in the temperature interval covering the range of existence of the solid hydrates, using a dynamic method in a flow apparatus. From measured equilibrium pressures, the changes of the thermodynamic functions accompanying these reactions were determined and the values of the heats of formation, of the Gibbs energies of formation and of the absolute entropies of the solid mono-, di- and trihydrate of lithium iodide at 298.15 K were calculated.

Đánh giá quan hệ giữa hàm lượng hơi nước khí quyển và độ chính xác định vị tuyệt đối bằng GPS ở Việt Nam

2008 ◽  
Vol 30 (2) ◽  
pp. 161-169
Author(s):  
Lê Huy Mình ◽  
Phạm Xuân Thành ◽  
Nguyễn Chiến Thắng ◽  
Trần Thị Lan ◽  
R. Fleury ◽  
...  
Keyword(s):  
Water Vapour ◽  
Viet Nam ◽  
Absolute Positioning ◽  
The Absolute

Estimatlon of the relatlon between the total tropospheric water vapour and the precision of the absolute positioning by GPS in Vietnam

scholarly journals An Accretion-Disc Model for the Algol-Type Eclipsing Binary System AV Del

2011 ◽  
Vol 28 (1) ◽  
pp. 38-45 ◽  
Author(s):  
S. M. R. Ghoreyshi ◽  
J. Ghanbari ◽  
F. Salehi
Keyword(s):  
Binary System ◽  
Radial Velocity ◽  
Outer Radius ◽  
Accretion Disc ◽  
Physical Parameters ◽  
Primary Star ◽  
Eclipsing Binary ◽  
Disc Model ◽  
The Absolute

AbstractThis study inspects the light and radial-velocity curves of the eclipsing binary AV Del. In comparison with other studies already done, the study shows that the absolute elements, fundamental orbital and physical parameters of the system can be determined using the Wilson-Devinney code. Using these parameters, the configuration of the system is presented. Then, an accretion disc model for the system is introduced by using the shellspec code. The results indicate that AV Del is a semi-detached system in which an optically thick accretion disc is surrounding the primary star. The outer radius of the disc is 8.0 R⊙, corresponding to a distance of 1.1 R⊙ from the surface of the secondary. Also, the temperature of the disc is calculated to be T = 5700 K.

scholarly journals Thermodynamic analysis of ternary system Ga-In-Sb

2008 ◽  
Vol 62 (3) ◽  
pp. 153-159 ◽  
Author(s):  
Lidija Gomidzelovic ◽  
Dragana Zivkovic ◽  
Ivan Mihajlovic
Keyword(s):  
General Solution ◽  
Ternary System ◽  
Temperature Interval ◽  
Thermodynamic Analysis ◽  
Interaction Parameters ◽  
Ternary Interaction ◽  
Gibbs Energies

The results of thermodynamic analysis of ternary system Ga-In-Sb are presented in these work. Thermodynamic analysis was carried out by applying general solution predicting method in sections from Ga, In and Sb corner, respectively, with following ratios 1:3, 1:1, 3:1 in the temperature interval 873 to 1673 K. Based on this, excess molar Gibbs energies and activity of all components in specified temperature interval were calculated. Also, using the obtained data and MLAB software, ternary interaction parameters for Ga-In-Sb system were determined.

The distribution of branched octanols between dodecane and water

1985 ◽  
Vol 63 (4) ◽  
pp. 789-792 ◽  
Author(s):  
Norman H. Sagert ◽  
Danny W. P. Lau
Keyword(s):  
Thermodynamic Functions ◽  
Distribution Data ◽  
Standard Entropy ◽  
Standard Thermodynamic Functions ◽  
Enthalpies Of Transfer ◽  
Data Standard ◽  
Gibbs Energies ◽  
Gibbs Energies Of Transfer ◽  
Branched Chain ◽  
Entropy Of Transfer

The distribution of four branched chain octanols, 3-ethyl-3-hexanol, 4-ethyl-3-hexanol, 2-ethyl-4-methylpentanol, and 4-octanol, has been measured between dodecane and water. Measurements were made at alcohol concentrations in the dodecane of less than 0.1 mol/dm3, and as a function of temperature from 10 °C to 35 °C. From these distribution data, standard thermodynamic functions for transfer were calculated. Standard Gibbs energies of transfer from water to dodecane at 25 °C were in the range −14.1 to −15.1 kJ/mol, whereas the standard enthalpies of transfer at 25 °C varied from 29 to 39 kJ/mol. Thus, the change in the standard enthalpy tends to inhibit transfer, but a large standard entropy of transfer results in dodecane being the favoured phase.

Determination of Basicities of Organic Solvents and Absolute Electrode Potentials (E0-Values) of Monovalent Ions in Organic Solvents based on Absolute Values of Gibbs Energies of Solvation of Single Ions

2004 ◽  
Vol 218 (5) ◽  
pp. 515-550 ◽  
Author(s):  
Ranjana Bhattacharyya ◽  
S. C. Lahiri
Keyword(s):  
Organic Solvents ◽  
Gibbs Energies ◽  
Electrode Potentials ◽  
Induced Dipole ◽  
Single Scale ◽  
Monovalent Ions ◽  
Born Equation ◽  
The Absolute ◽  
Single Standard

AbstractSingle ion Gibbs energies of monovalent ions in fourteen solvents (water, methanol, NMF, PC, ethanol, n-propanol, iso-propanol, n-butanol, t-butanol, ethylene glycol, acetone, THF, 1,4-dioxan, acetonitrile) with or without (ion–dipole, ion–induced dipole, ion–quadrupole) interactions were determined. The basicity of the solvents was determined from the absolute values of ΔG0solvation(H+) or ΔG0solution(H+) based on single standard state utilising the modified Born equation suggested by Lahiri. The method involves no arbitrary assumptions. A single scale for the absolute electrode potentials (E0 values) has been determined based on calculated Gibbs energies of solvation or solution of single ions. Appropriation of Gibbs energies of solvation of electrolytes into single ion values is not possible. Gibbs energies of formation of electrolytes in solvents must be taken into consideration. Stabilisation energies of electrolytes (MX) in solvents akin to lattice energies in solids were determined.

scholarly journals VLBA H2O and SiO maser observations in the pPN OH 231.8+4.2

2007 ◽  
Vol 3 (S242) ◽  
pp. 338-339
Author(s):  
J.-F. Desmurs ◽  
C. Sánchez Contreras ◽  
V. Bujarrabal ◽  
J. Alcolea ◽  
F. Colomer
Keyword(s):  
High Resolution ◽  
Water Vapour ◽  
Planetary Nebulae ◽  
Absolute Position ◽  
Long Baseline ◽  
The Absolute ◽  
Very Long Baseline Array

AbstractWe report high-resolution observations of H2O, 61,6−52,3 and 28SiO v=2, J=1-0 maser emissions obtained with the Very Long Baseline Array in the bipolar pre-planetary nebulae OH 231.8+4.2 (see Desmurs et al., 2007). A phase referencing technique was used to recover the absolute position of both emissions. We detected two groups of water vapour emission oriented nearly north-south. SiO masers are tentatively found to be placed between the two H2O maser emitting regions.

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