Heats of solution of several freons in water from 5 to 45�C

Naghibi, Hossein; Ownby, David W.; Gill, Stanley J.

doi:10.1007/bf00646984

Cited by 14 publications

(3 citation statements)

References 24 publications

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“…For aqueous solutions, say, of the rare gases below 373 K, their contributions are small [247], usually smaller than the experimental error associated with current high-precision measurements, though they become more important in the critical region. World-wide, there were essentially only two groups that could provide the necessary highprecision experimental data on h 2,1 Direct calorimetric determinations of the high-dilution molar enthalpy change on solution Δ sol H of a gas in a liquid have been carried out by only a very limited number of researchers [265][266][267][268][269][270][271][272][273][274][275][276][277], simply because of the experimental difficulties associated with accurate measurements of very small heat effects in very dilute solutions (typically, aqueous mole fraction solubilities at ambient temperature and 0.1 MPa gas pressure are about 10 −5 to 10 −4 ). Recently, various calorimeter designs used in this field were discussed in detail by Wilhelm and Battino [241].…”

Section: And By Analogous Argumentsmentioning

confidence: 99%

Solutions, in Particular Dilute Solutions of Nonelectrolytes: A Review

Wilhelm¹

2021

J Solution Chem

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The liquid state is one of the three principal states of matter and arguably the most important one; and liquid mixtures represent a large research field of profound theoretical and practical interest. This topic is of importance in many areas of the applied sciences, such as in chemical engineering, geochemistry, the environmental sciences, biophysics and biomedical technology. First, I will concisely present a review of important concepts from classical thermodynamics of nonelectrolyte solutions; this will be followed by a survey of (semi-)empirical approaches to representing the composition and temperature dependence of selected thermodynamic mixture properties, and finally the focus will be on dilute binary nonelectrolyte solutions where one component, a supercritical solute, is present in much smaller quantity than the other component, called the solvent. Partial molar properties in the limit of infinite dilution (indicated by a superscript ∞) are of particular interest. For instance, activity coefficients (Lewis–Randall (LR) convention) are customarily used to characterize mixing behavior, and infinite-dilution values $$\gamma_{i}^{{{\text{LR,}}\infty }}$$ γ i LR, ∞ provide a convenient route for obtaining binary parameters for several popular solution models. When discussing solute (j)—solvent (i) interactions in solutions where the solute is supercritical, the Henry fugacity $$h_{j,i} \left( {T,P} \right)$$ h j , i T , P , also known as Henry’s law (HL) constant, is a measurable thermodynamic key quantity. Its temperature dependence yields information on the partial molar enthalpy change on solution $$\Delta H_{j}^{\infty } \left( {T,P} \right)$$ Δ H j ∞ T , P , while its pressure dependence yields information on the partial molar volume $$V_{j}^{{{\text{L,}}\infty }} \left( {T,P} \right)$$ V j L, ∞ T , P of solute j in the liquid phase (superscript L). I will clarify issues frequently overlooked, touch upon solubility data reduction and correlation, report a few recent high-precision experimental results on dilute aqueous solutions of supercritical nonelectrolytes, and show the equivalency of results for caloric quantities (e.g. $$\Delta H_{j}^{\infty }$$ Δ H j ∞ ) obtained via van ’t Hoff analysis of high-precision solubility data with directly measured calorimetric data.

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Section: And By Analogous Argumentsmentioning

confidence: 99%

Solutions, in Particular Dilute Solutions of Nonelectrolytes: A Review

Wilhelm¹

2021

J Solution Chem

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“…The microcalorimeters developed by Gill and co-workers and Wadsö and co-workers (collaborating with each other) reported exceptionally precise data, − and their results are used in this paper. Biggerstaff et al directly measured the heat capacity of Ar in water from (306 to 578) K and reported an extrapolated value at 298.15 K.…”

Section: Relevant Literaturementioning

confidence: 99%

“…389 ( 2825 CCl 2 F 2 23.5 ( 1.735 197 ( 5235 26.13 ( 0.1829 315 ( 1129 The solubility datum is for 313.15 K. b Extrapolated value at 31 MPa. c Extrapolated value at 18 MPa.…”

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Thermodynamics Works! Enthalpy and Heat Capacity Changes on Solution from Gas Solubility Data

Battino

2008

J. Chem. Eng. Data

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Thermodynamic relationships connect many phenomena in somewhat surprising ways. This paper discusses how calorimetric information (enthalpy and heat capacity changes on solution) can be derived from data on the solubility of gases in liquids as a function of temperature. The primary examples come from the high-precision data on the solubility of a number of gases in water where there are calorimetric results on gas solubilities for comparison purposes.

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