Determination of Heats of Vaporization from Vapor Pressure Data

1922 ◽  
Vol 14 (6) ◽  
pp. 486-486 ◽  
Author(s):  
W. K. LEWIS ◽  
H. C. WEBER
Keyword(s):  
Vapor Pressure ◽  
Pressure Data ◽  
Vapor Pressure Data ◽  
Heats Of Vaporization

The Interaction between Rubber and Liquids. 1. A Thermodynamical Study of the System Rubber-Benzene

1943 ◽  
Vol 16 (1) ◽  
pp. 89-110
Author(s):  
G. Gee ◽  
L. R. G. Treloar
Keyword(s):  
Vapor Pressure ◽  
Solution Temperature ◽  
Free Energies ◽  
Pressure Data ◽  
Heat Of Solution ◽  
Dilute Solutions ◽  
Heat Of Dilution ◽  
Vapor Pressure Data ◽  
Heats Of Dilution

Abstract Equations are developed relating the thermodynamic properties of a mixture of rubber + liquid with the vapor pressure of the liquid above the mixture. Experimental methods are described for the determination of vapor pressure over the whole range of composition of the mixture. By the use of four different methods, it was possible to measure relative vapor pressure lowerings Apo/po° from 2×10−6 to 0.997. Complete vapor pressure data are given for rubber-benzene mixtures at 25° C, together with the calculated Gibbs' free energies of dilution and solution. Temperature coefficient measurements at a number of concentrations are employed to calculate heats of dilution, and these are interpplated by a modified form of an equation due to Langmuir. In this way the heats of dilution and solution are also obtained over the whole range of composition. Combining the heat and free energy data gives the entropies of dilution and solution. The entropy of dilution is approximately twice the heat of dilution over a wide concentration range and, except in dilute solutions (< 5% rubber), both are independent of the molecular weight of the rubber. The entropy of dilution is very much larger than its ideal value, and can be approximately represented by an equation of Flory, though there are significant discrepancies in the region of dilute solutions. The molar heat of solution of rubber is so large that the miscibility of rubber and benzene can be explained only by the anomalously large entropy of solution.

scholarly journals Extremely Low Vapor‐Pressure Data as Access to PC‐SAFT Parameter Estimation for Ionic Liquids and Modeling of Precursor Solubility in Ionic Liquids

ChemistryOpen ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 216-226
Author(s):  
Mark Bülow ◽  
Moritz Greive ◽  
Dzmitry H. Zaitsau ◽  
Sergey P. Verevkin ◽  
Christoph Held
Keyword(s):  
Parameter Estimation ◽  
Ionic Liquids ◽  
Vapor Pressure ◽  
Pressure Data ◽  
Vapor Pressure Data

The vapor pressure of n-alkanes revisited. New high-precision vapor pressure data on n-decane, n-eicosane, and n-octacosane

1989 ◽  
Vol 34 (2) ◽  
pp. 149-156 ◽  
Author(s):  
Robert D. Chirico ◽  
Nguyen An ◽  
William V. Steele ◽  
M. Michael Strube ◽  
Costa Tsonopoulos
Keyword(s):  
Vapor Pressure ◽  
High Precision ◽  
Pressure Data ◽  
Vapor Pressure Data
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