Thermal Expansivity and Isothermal Compressibility Measurements on Rare Gas Solids by an Optical Method

1970 ◽  
Vol 41 (13) ◽  
pp. 5082-5084 ◽  
Author(s):  
H. J. Coufal ◽  
R. Veith ◽  
P. Korpiun ◽  
E. Lüscher
Keyword(s):  
Optical Method ◽  
Isothermal Compressibility ◽  
Thermal Expansivity ◽  
Rare Gas

Molar volume, thermal expansivity and isothermal compressibility of trans-decahydronaphthalene up to 200MPa and 446K

2005 ◽  
Vol 14 (12) ◽  
pp. 2433-2439 ◽  
Author(s):  
Zhu Hu-Gang ◽  
Liu Zhi-Hua ◽  
Tian Yi-Ling ◽  
Xue Yuan ◽  
Yin Liang
Keyword(s):  
Molar Volume ◽  
Isothermal Compressibility ◽  
Thermal Expansivity

APPLICATION OF THE PIPPARD RELATIONS TO AMMONIA NEAR THE MELTING POINT

1999 ◽  
Vol 13 (21n22) ◽  
pp. 2783-2790 ◽  
Author(s):  
H. YURTSEVEN
Keyword(s):  
Experimental Data ◽  
Phase Transition ◽  
Melting Point ◽  
Specific Heat ◽  
Isothermal Compressibility ◽  
Thermal Expansivity ◽  
Critical Transition ◽  
Type Phase

This study gives our application of the Pippard relations to the ammonia near its melting point. The Pippard relations between the specific heat C P , the thermal expansivity α P and the isothermal compressibility κ T , have been established for the ammonia near its melting point. We have obtained that the Pippard relations are valid for the ammonia. We give here an evidence that on the basis of the experimental data the critical transition in this system near its melting point can be considered as the λ-type phase transition.

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.

Thermal Expansivity and Isothermal Compressibility of Solid Kr between 4 and 115°K

1970 ◽  
Vol 38 (2) ◽  
pp. A127-A130 ◽  
Author(s):  
H. J. Coufal ◽  
R. Veith ◽  
P. Korpiun ◽  
E. Lüscher
Keyword(s):  
Isothermal Compressibility ◽  
Thermal Expansivity

Thermodynamic Functions at Isobaric Process of van der Waals Gases

2000 ◽  
Vol 55 (11-12) ◽  
pp. 851-855
Author(s):  
Akira Matsumoto
Keyword(s):  
Heat Capacity ◽  
Free Energy ◽  
Critical Point ◽  
Thermodynamic Functions ◽  
Isothermal Compressibility ◽  
Van Der Waals ◽  
Thermal Expansivity ◽  
Van Der Waals Equation ◽  
Reduced Temperature ◽  
Isobaric Process

Abstract The thermodynamic functions for the van der Waals equation are investigated at isobaric process. The Gibbs free energy is expressed as the sum of the Helmholtz free energy and PV, and the volume in this case is described as the implicit function of the cubic equation for V in the van der Waals equation. Furthermore, the Gibbs free energy is given as a function of the reduced temperature, pressure and volume, introducing a reduced equation of state. Volume, enthalpy, entropy, heat capacity, thermal expansivity, and isothermal compressibility are given as functions of the reduced temperature, pressure and volume, respectively. Some thermodynamic quantities are calculated numerically and drawn graphically. The heat capacity, thermal expansivity, and isothermal compressibility diverge to infinity at the critical point. This suggests that a second-order phase transition may occur at the critical point.

scholarly journals Modeling of density and calculations of derived volumetric properties for n-hexane, toluene and dichloromethane at pressures 0.1-60 MPa and temperatures 288.15-413.15 K

2015 ◽  
Vol 80 (11) ◽  
pp. 1423-1433 ◽  
Author(s):  
Gorica Ivanis ◽  
Aleksandar Tasic ◽  
Ivona Radovic ◽  
Bojan Djordjevic ◽  
Slobodan Serbanovic ◽  
...  
Keyword(s):  
Isothermal Compressibility ◽  
Constant Pressure ◽  
Thermal Expansivity ◽  
Volumetric Properties ◽  
Density Data ◽  
Tait Equation Of State ◽  
Derived Properties ◽  
Temperature And Pressure ◽  
The Difference ◽  
Isobaric Thermal Expansivity

Densities data of n-hexane, toluene and dichloromethane at temperatures 288.15-413.15 K and at pressures 0.1-60 MPa, determined in our previous work, were fitted to the modified Tait equation of state. The fitted temperature-pressure dependent density data were used to calculate the derived properties: the isothermal compressibility, the isobaric thermal expansivity, the difference between specific heat capacity at constant pressure and at constant volume and the internal pressure, over the entire temperature and pressure intervals specified above. In order to assess the proposed modeling procedure, a comparison of the obtained values for the isothermal compressibility and the isobaric thermal expansivity with the corresponding literature data were performed. The average absolute percentage deviations for isothermal compressibility were: for n-hexane 2.01-3.64%, for toluene 0.64-2.48% and for dichloromethane 1.81-3.20%; for the isobaric thermal expansivity: for n-hexane 1.31-4.17%, for toluene 0.71-2.45% and for dichloromethane 1.16-1.61%. By comparing the obtained deviations values with those found in the literature it can be concluded that the presented results agree good with the literature data.

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