Titel
Solubility of Gases in Liquids. 23: High-Precision Determination of Henry’s Law Constants of Propane Dissolved in Liquid Water from T = 278 K to T = 318 K
Autor*in
T. R. Rettich
Department of Chemistry, Illinois Wesleyan University
Rubin Battino
Department of Chemistry, Wright State University
Abstract
The solubility of propane (C3H8, component 2) in pure liquid water (H2O, component 1) was determined at a total pressure of about 100 kPa from about T = 278 K to T = 318 K using an analytical method characterized by an imprecision of about ± 0.1% or less. The measurements were made with a Benson-Krause-type apparatus at roughly 5 K intervals. From the experimental results, Henry’s law constants h2 , 1(T, Pσ,1) , also known as Henry fugacities, at the vapor pressure Pσ,1(T) of water, as well as the Ostwald coefficient L2,1∞(T,Pσ,1) at infinite dilution are rigorously obtained. The temperature dependence is accounted for by a three-constant Benson-Krause equation, i.e., by fitting ln [h2 , 1(T, Pσ,1) / kPa] to a power series in 1/T. Subsequently, the partial molar enthalpy changes on solution ΔH2∞ of propane in water, and the partial molar heat capacity changes on solution ΔCP,2∞ , are reported (van ‘t Hoff analysis) and compared with calorimetrically determined quantities: agreement is highly satisfactory. We believe that our new values for the Henry fugacity and the Ostwald coefficient of propane dissolved in liquid water are the most reliable ones to date.
Stichwort
Solubility of propane in waterHenry fugacity (Henry’s law constant)Ostwald coefficientvan ‘t Hoff analysisPartial molar enthalpy changes on solutionPartial molar heat capacity changes on solution
Objekt-Typ
Sprache
Englisch [eng]
Persistent identifier
Erschienen in
Titel
Journal of Solution Chemistry
ISSN
0095-9782
Erscheinungsdatum
2023
Publication
Springer Science and Business Media LLC
Erscheinungsdatum
2023
Zugänglichkeit
Rechte
Rechteangabe
© The Author(s) 2023
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