Isobaric Thermal Expansivity for Ionic Liquids with a Common Cation as a Function of Temperature and Pressure†

2010 ◽  
Vol 55 (2) ◽  
pp. 590-594 ◽  
Author(s):  
Paloma Navia ◽  
Jacobo Troncoso ◽  
Luis Romaní
Keyword(s):  
Ionic Liquids ◽  
Thermal Expansivity ◽  
Temperature And Pressure ◽  
Isobaric Thermal Expansivity

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.

Liquid dibromomethane under pressure: a computational study

2021 ◽  
Vol 23 (4) ◽  
pp. 2964-2971
Author(s):  
Bernadeta Jasiok ◽  
Mirosław Chorążewski ◽  
Eugene B. Postnikov ◽  
Claude Millot
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulations ◽  
Thermophysical Properties ◽  
Computational Study ◽  
Thermal Expansivity ◽  
Dynamics Simulations ◽  
Isobaric Thermal Expansivity

Thermophysical properties of liquid dibromomethane are investigated by molecular dynamics simulations between 268 and 328 K at pressures up to 3000 bar. Notably, the isotherms of the isobaric thermal expansivity cross around 800 bar.

On the temperature and pressure dependence of dielectric relaxation processes in ionic liquids

2021 ◽  
Author(s):  
Florian Pabst ◽  
Zaneta Wojnarowska ◽  
Marian Paluch ◽  
Thomas Blochowicz
Keyword(s):  
Ionic Liquids ◽  
Dielectric Relaxation ◽  
Pressure Dependence ◽  
Dynamic Processes ◽  
Relaxation Processes ◽  
Dielectric Spectra ◽  
Temperature And Pressure ◽  
Microscopic Origin

The temperature and pressure dependence of two dynamic processes in the dielectric spectra of five supercooled ionic liquids equipped with octyl-chains are reported. The microscopic origin of these processes is discussed.

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