Henry’s law, surface tension, and surface adsorption in dilute binary mixtures

We put forth a simple and yet practical theoretical model generalized from Raoult’s law and Henry’s law and show that it can be reduced to these two laws under limiting conditions. The model entertains a hybrid parameter h_B with activity coefficient bundled into it, which smoothly bridges the p_B^* and K_B coefficients in Raoult’s law and Henry’s law. The value of h_B falls in the interval of [K_B, p_B^*] or [p_B^*, K_B] in the case of negative or positive deviation from Raoult’s law, respectively. We uncover an overlapping rule for the ranges of h_A and h_B, which binary mixtures must obey to form azeotropes. We also provide straightforward ways to analyze the characteristic mole fraction and pressure for azeotropes and to understand the relative positions of vapor composition curves with respect to the liquid counterparts. We rely heavily on experimental data available in the literature for representative binary mixtures with both negative and positive deviations from Raoult’s law to illustrate the algebraic derivations. The knowledge gained is useful in the analysis of experimental data from vapor-liquid equilibrium measurements and possess pedagogical merit in various relevant fields.

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A Simple and Practical Theoretical Model for Interpreting Binary Azeotropes

10.26434/chemrxiv-2021-xsj92 ◽

2021 ◽

Author(s):

Jingsong Huang ◽

Panchapakesan Ganesh ◽

Bobby G. Sumpter ◽

David S. Sholl ◽

Kunlun Hong

Keyword(s):

Experimental Data ◽

Theoretical Model ◽

Binary Mixtures ◽

Henry's Law ◽

Positive Deviation ◽

Liquid Equilibrium ◽

Vapor Composition ◽

Raoult’S Law ◽

Henry’S Law ◽

Raoult's Law

We put forth a simple and yet practical theoretical model generalized from Raoult’s law and Henry’s law and show that it can be reduced to these two laws under limiting conditions. The model entertains a hybrid parameter h_B with activity coefficient bundled into it, which smoothly bridges the p_B^* and K_B coefficients in Raoult’s law and Henry’s law. The value of h_B falls in the interval of [K_B, p_B^*] or [p_B^*, K_B] in the case of negative or positive deviation from Raoult’s law, respectively. We uncover an overlapping rule for the ranges of h_A and h_B, which binary mixtures must obey to form azeotropes. We also provide straightforward ways to analyze the characteristic mole fraction and pressure for azeotropes and to understand the relative positions of vapor composition curves with respect to the liquid counterparts. We rely heavily on experimental data available in the literature for representative binary mixtures with both negative and positive deviations from Raoult’s law to illustrate the algebraic derivations. The knowledge gained is useful in the analysis of experimental data from vaporliquid equilibrium measurements and possess pedagogical merit in various relevant fields.

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Henry's Law Constants for 2-Azidoethanamine Hypergols: Estimates From a Density Functional Theory/Polarizable Continuum Model

10.21236/ada500662 ◽

2009 ◽

Cited By ~ 2

Author(s):

Michael J. McQuaid

Keyword(s):

Density Functional Theory ◽

Continuum Model ◽

Density Functional ◽

Polarizable Continuum Model ◽

Henry's Law ◽

Functional Theory ◽

Henry’S Law ◽

Henry’S Law Constants ◽

Henry's Law Constants ◽

Polarizable Continuum

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On the Role of Marangoni Effects on the Critical Heat Flux for Pool Boiling of Binary Mixtures

Journal of Heat Transfer ◽

10.1115/1.2824021 ◽

1996 ◽

Vol 118 (1) ◽

pp. 103-109 ◽

Cited By ~ 52

Author(s):

W. R. McGillis ◽

V. P. Carey

Keyword(s):

Surface Tension ◽

Heat Flux ◽

Binary Mixtures ◽

Critical Heat Flux ◽

Full Range ◽

Pool Boiling ◽

Marangoni Effect ◽

Restoring Force ◽

Marangoni Effects

The Marangoni effect on the critical heat flux (CHF) condition in pool boiling of binary mixtures has been identified and its effect has been quantitatively estimated with a modified model derived from hydrodynamics. The physical process of CHF in binary mixtures, and models used to describe it, are examined in the light of recent experimental evidence, accurate mixture properties, and phase equilibrium revealing a correlation to surface tension gradients and volatility. A correlation is developed from a heuristic model including the additional liquid restoring force caused by surface tension gradients. The CHF condition was determined experimentally for saturated methanol/water, 2-propanol/water, and ethylene glycol/water mixtures, over the full range of concentrations, and compared to the model. The evidence in this study demonstrates that in a mixture with large differences in surface tension, there is an additional hydrodynamic restoring force affecting the CHF condition.

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Henry’s law constants of volatile organic compounds between 0 and 95 °C – Data compilation and complementation in context of urban temperature increases of the subsurface

Chemosphere ◽

10.1016/j.chemosphere.2021.129858 ◽

2021 ◽

Vol 272 ◽

pp. 129858

Author(s):

Alexander Schwardt ◽

Andreas Dahmke ◽

Ralf Köber

Keyword(s):

Volatile Organic Compounds ◽

Organic Compounds ◽

Henry's Law ◽

Henry’S Law ◽

Data Compilation ◽

Volatile Organic ◽

Henry’S Law Constants ◽

Henry's Law Constants

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