CALCULATION OF THE MOLAR VOLUME IN THE SOLID AND LIQUID PHASES OF CCl4

2010 ◽  
Vol 24 (01) ◽  
pp. 75-80 ◽  
Author(s):  
H. YURTSEVEN ◽  
D. KAVRUK
Keyword(s):  
Melting Point ◽  
Molar Volume ◽  
Solid Phase ◽  
Anomalous Behavior ◽  
Thermal Expansivity ◽  
Temperature Variations ◽  
Liquid Phases ◽  
Temperature Ranges ◽  
Temperature And Pressure ◽  
The Given

The molar volume of carbon tetrachloride is calculated as functions of temperature and pressure close to the melting point. By analyzing the experimental data for the pressure dependence of the thermal expansivity according to a power-law formula, the molar volume is calculated for the solid and liquid phases of this molecular organic compound. Our calculations show that the molar volume of the solid phase increases almost linearly as the temperature and pressure increase, so that there is no anomalous behavior close to the melting point in CCl 4. In the liquid phase, it does not vary considerably within the given pressure and temperature ranges. Our calculated molar volumes can be compared with measurements for CCl 4 under the given pressure and temperature variations.

scholarly journals Структура, зеренное строение и диэлектрические свойства керамик твердых растворов YCu-=SUB=-x-=/SUB=-Mn-=SUB=-1-x-=/SUB=-O-=SUB=-3-=/SUB=-

2021 ◽  
Vol 63 (3) ◽  
pp. 400
Author(s):  
А.В. Назаренко ◽  
А.В. Павленко ◽  
К.Г. Абдулвахидов
Keyword(s):  
Solid Phase ◽  
Hexagonal Phase ◽  
Anomalous Behavior ◽  
Ceramic Technology ◽  
Grain Structure ◽  
Dielectric Characteristics ◽  
Liquid Phases ◽  
Solid Phase Reactions ◽  
Interlayer Polarization ◽  
Isostructural Phase Transition

Solid solution ceramics of the YCuxMn1-xO3 system at x = 0.05; 0.10; 0.15 were prepared by solid-phase reactions followed by sintering using conventional ceramic technology. The study of their structure, microstructure and dielectric properties including of temperature and frequencies investigation of dielectric permittivity, conductivity and tangent of dielectric loses is carried out. It is established that hexagonal phase is predominantly formed in the ceramics. Its grain structure is unhomogenius, while synthesis is performed with the formation of liquid phases of eutectic origin. It is shown that anomalous behavior of dielectric characteristics at Т=30-200 ºС connected to interlayer polarization effects, while features at Т = 222 ºС (x = 0.05), 234 ºС (x = 0.10) and 247 ºС (x = 0.15) we connected to “isostructural” phase transition that is intermediate between the ferroelectric and paraelectric phases.

The polarizations of liquids

1955 ◽  
Vol 8 (3) ◽  
pp. 329 ◽  
Author(s):  
RJW Le Fevre ◽  
AAS Narayana Rao
Keyword(s):  
Melting Point ◽  
Molar Volume ◽  
Temperature And Pressure

Equations suggested previously by Raman and Krishnan, Goss, Onsager, B�ttcher, Frenkel, and Scholte are reviewed, and their applicabilities to observations by experiment are considered. Difficulties arise in estimating the dimensions of the cavity appropriate for a given molecule. It is shown that by taking this generally as ellipsoidal, with semi-axes a, b, and c, and computing the product abc from the molar volume at the melting point, a generalized Scholte equation gives satisfactory forecasts of the polarizations of liquids and vapours, and of the variations of the former with temperature and pressure, for a number of representative substances.

CALCULATION OF VOLUME AS FUNCTIONS OF TEMPERATURE AND PRESSURE IN ICE I CLOSE TO THE MELTING POINT

2010 ◽  
Vol 24 (19) ◽  
pp. 3749-3758
Author(s):  
E. KILIT ◽  
H. YURTSEVEN
Keyword(s):  
Experimental Data ◽  
Melting Point ◽  
Temperature Dependence ◽  
Pressure Dependence ◽  
Critical Behavior ◽  
Isothermal Compressibility ◽  
Thermal Expansivity ◽  
Experimental Measurements ◽  
Approximate Relation ◽  
Temperature And Pressure

We calculate in this study the volume of ice I as functions of temperature and pressure close to the melting point by analyzing the experimental data for the thermal expansivity. Using an approximate relation, the temperature dependence of the volume is calculated at 202.4 MPa from the thermal expansivity of ice I. The pressure dependence of the volume is also calculated at 252.3 K from the isothermal compressibility of ice I close to the melting point. The volume calculated here as functions of temperature and pressure shows critical behavior close to the melting point in ice I, which can be tested by the experimental measurements.

RAMAN STUDY OF BENZENE NEAR THE MELTING POINT

2013 ◽  
Vol 27 (14) ◽  
pp. 1350063 ◽  
Author(s):  
H. YURTSEVEN ◽  
E. ÇETINBAŞ İŞERI
Keyword(s):  
Melting Point ◽  
Molar Volume ◽  
Grüneisen Parameter ◽  
Volume Data ◽  
Gruneisen Parameter ◽  
Liquid Phases ◽  
Raman Study ◽  
Lattice Modes ◽  
Good Agreement

We calculate here the Raman frequencies of some lattice modes as a function of pressure at constant temperatures for the solid and liquid phases of benzene. The observed data for the molar volume from literature is used to calculate the Raman frequencies through the mode Grüneisen parameter in benzene. Our calculated frequencies are in good agreement with the observed data when the mode Grüneisen parameter is taken as a constant at one particular pressure in solid benzene. It is shown here that the Raman frequencies can be calculated from the volume data, as demonstrated for benzene here.

Heat capacities and enthalpies of fusion and transformation for solvates of some salts with dimethyl sulfoxide and dimethylformamide

1988 ◽  
Vol 53 (12) ◽  
pp. 3072-3079
Author(s):  
Mojmír Skokánek ◽  
Ivo Sláma
Keyword(s):  
Heat Capacity ◽  
Phase Transformation ◽  
Phase Transformations ◽  
Dimethyl Sulfoxide ◽  
Liquidus Temperature ◽  
Molar Heat Capacity ◽  
Solid Phase ◽  
Zinc Nitrate ◽  
Heat Capacities ◽  
Liquid Phases

Molar heat capacities and molar enthalpies of fusion of the solvates Zn(NO3)2 . 2·24 DMSO, Zn(NO3)2 . 8·11 DMSO, Zn(NO3)2 . 6 DMSO, NaNO3 . 2·85 DMSO, and AgNO3 . DMF, where DMSO is dimethyl sulfoxide and DMF is dimethylformamide, have been determined over the temperature range 240 to 400 K. Endothermic peaks found for the zinc nitrate solvates below the liquidus temperature have been ascribed to solid phase transformations. The molar enthalpies of the solid phase transformations are close to 5 kJ mol-1 for all zinc nitrate solvates investigated. The dependence of the molar heat capacity on the temperature outside the phase transformation region can be described by a linear equation for both the solid and liquid phases.

Simultaneous sintering of low-melting-point Mg with high-melting-point Ti via a novel one-step high-pressure solid-phase sintering strategy

2021 ◽  
Vol 858 ◽  
pp. 158344
Author(s):  
Xuecheng Cai ◽  
Shuaijun Ding ◽  
Zhongjie Li ◽  
Xin Zhang ◽  
Kangkang Wen ◽  
...  
Keyword(s):  
High Pressure ◽  
Melting Point ◽  
Solid Phase ◽  
High Melting ◽  
High Melting Point ◽  
One Step

Thermal expansion and heat capacities of AgBr and AgCl at solid and liquid phases from molecular dynamics simulation

2015 ◽  
Vol 29 (14) ◽  
pp. 1550091 ◽  
Author(s):  
Ü. Akdere
Keyword(s):  
Molecular Dynamics ◽  
Thermal Expansion ◽  
Molecular Dynamics Simulation ◽  
Silver Chloride ◽  
Linear Thermal Expansion ◽  
Anomalous Behavior ◽  
Heat Capacities ◽  
Constant Volume ◽  
Dynamics Simulation ◽  
Liquid Phases

Classical molecular dynamics simulation calculations of silver bromide, AgBr, and silver chloride, AgCl. in constant volume–energy (NVE) and constant pressure–temperature (NPT) ensembles have been performed. The temperature dependence of linear thermal expansion and molar heat capacities at constant volume and pressure have been presented at solid and liquid phases. The anomalous behavior of these properties about 200 K below the melting temperatures has been analyzed within the frame of the onset of the transition to the superionic phase.

Supported imidazolium ionic liquid phases: A new material for solid-phase extraction

Talanta ◽  
2009 ◽  
Vol 80 (1) ◽  
pp. 250-256 ◽  
Author(s):  
Núria Fontanals ◽  
Sylwia Ronka ◽  
Francesc Borrull ◽  
Andrzej W. Trochimczuk ◽  
Rosa M. Marcé
Keyword(s):  
Ionic Liquid ◽  
Solid Phase Extraction ◽  
Solid Phase ◽  
Phase Extraction ◽  
Imidazolium Ionic Liquid ◽  
Liquid Phases ◽  
New Material
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