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Solid-vapor

Systems involving an interface are often metastable, that is, essentially in equilibrium in some aspects although in principle evolving slowly to a final state of global equilibrium. The solid-vapor interface is a good example of this. We can have adsorption equilibrium and calculate various thermodynamic quantities for the adsorption process yet the particles of a solid are unstable toward a drift to the final equilibrium condition of a single, perfect crystal. Much of Chapters IX and XVII are thus thermodynamic in content. [Pg.2]

Molecular dynamics calculations have been made on atomic crystals using a Lennard-Jones potential. These have to be done near the melting point in order for the iterations not to be too lengthy and have yielded density functioi). as one passes through the solid-vapor interface (see Ref. 45). The calculations showed considerable mobility in the surface region, amounting to the presence of a... [Pg.266]

Molecular dynamics and density functional theory studies (see Section IX-2) of the Lennard-Jones 6-12 system determine the interfacial tension for the solid-liquid and solid-vapor interfaces [47-49]. The dimensionless interfacial tension ya /kT, where a is the Lennard-Jones molecular size, increases from about 0.83 for the solid-liquid interface to 2.38 for the solid-vapor at the triple point [49], reflecting the large energy associated with a solid-vapor interface. [Pg.267]

Ruch and Bartell [84], studying the aqueous decylamine-platinum system, combined direct estimates of the adsorption at the platinum-solution interface with contact angle data and the Young equation to determine a solid-vapor interfacial energy change of up to 40 ergs/cm due to decylamine adsorption. Healy (85) discusses an adsorption model for the contact angle in surfactant solutions and these aspects are discussed further in Ref. 86. [Pg.361]

There is a number of very pleasing and instructive relationships between adsorption from a binary solution at the solid-solution interface and that at the solution-vapor and the solid-vapor interfaces. The subject is sufficiently specialized, however, that the reader is referred to the general references and, in particular, to Ref. 153. Finally, some studies on the effect of high pressure (up to several thousand atmospheres) on binary adsorption isotherms have been reported [154]. Quite appreciable effects were found, indicating that significant partial molal volume changes may occur on adsorption. [Pg.411]

When the sample is a solid, a separation of the analyte and interferent by sublimation may be possible. The sample is heated at a temperature and pressure below its triple point where the solid vaporizes without passing through the liquid state. The vapor is then condensed to recover the purified solid. A good example of the use of sublimation is in the isolation of amino acids from fossil mohusk shells and deep-sea sediments. ... [Pg.209]

Solid Vapor Solid Vapor Solid Vapor... [Pg.348]

Vapor pressure is the most important of the basic thermodynamic properties affec ting liquids and vapors. The vapor pressure is the pressure exerted by a pure component at equilibrium at any temperature when both liquid and vapor phases exist and thus extends from a minimum at the triple point temperature to a maximum at the critical temperature, the critical pressure. This section briefly reviews methods for both correlating vapor pressure data and for predicting vapor pressure of pure compounds. Except at very high total pressures (above about 10 MPa), there is no effect of total pressure on vapor pressure. If such an effect is present, a correction, the Poynting correction, can be applied. The pressure exerted above a solid-vapor mixture may also be called vapor pressure but is normallv only available as experimental data for common compounds that sublime. [Pg.389]

T Solid-vapor interfacial energy dyn/cm dyn/cm z Pow der shear stress kg/cm psf... [Pg.1821]

Physical and Chemical Properties - Physical State at 15 C and 1 atm. Solid Molecular Weight 179.08 Boiling Point at 1 atm. 655, 346, 619 Freezing Point 230, 110, 383 Critical Temperature Not pertinent Critical Pressure Not pertinent Specific Gravity 1.2 at 20 °C (solid) Vapor (Gas) Density Not pertinent Ratio of Specific Heats of Vapor (Gas) Not pertinent Latent Heat of Vaporization Not pertinent Heat of Combustion -15800, -8790, -368 Heat of Decomposition Not pertinent. [Pg.7]


See other pages where Solid-vapor is mentioned: [Pg.68]    [Pg.63]    [Pg.247]    [Pg.281]    [Pg.452]    [Pg.202]    [Pg.1880]    [Pg.99]    [Pg.11]    [Pg.16]    [Pg.26]    [Pg.27]    [Pg.28]    [Pg.30]    [Pg.31]    [Pg.33]    [Pg.47]    [Pg.51]    [Pg.64]    [Pg.67]    [Pg.68]   
See also in sourсe #XX -- [ Pg.296 ]




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Adsorption at the Solid-Vapor Interface

Adsorption of Gases and Vapors on Solids

Amorphous solids water vapor absorption

Boundary solid-vapor

Clausius-Clapeyron equation pure solid-vapor equilibrium

Equilibrium constant vapor-solid

Equilibrium three-phase solid-liquid-vapor

Equilibrium vapor-liquid-solid

GASES, VAPORS, LIQUIDS, AND SOLIDS

Growth vapor-solid

Handling Solids with Flammable Vapors

Instrument parameters affecting solid sampling with electrothermal atomizers and vaporizers

Interfacial energy solid-vapor

Models vapor-liquid-solid growth

Multicomponent predicting vapor-liquid-solid

Nanowires vapor-liquid-solid growth

Nanowires vapor-liquid-solid synthesis

Phase changes solid- vapor

Saturated Water Solid-Vapor

Silicon nanowires vapor-liquid-solid growth

Silicon vapor solid reaction

Silicon vapor-liquid-solid process

Solid Vapor Equilibrium (SVE)

Solid sampling modes in electrothermal vaporizers and atomizers

Solid vapor interface, contact angle

Solid-State Vapor Generator

Solid-Vapor Adsorption Isotherms

Solid-Vapor Equilibrium of the Carbon Dioxide-Nitrogen System at Pressures to

Solid-Vapor Phase Transition

Solid-Vapor Reactions

Solid-liquid-vapor binary system

Solid-liquid-vapor dioxide system

Solid-liquid-vapor interactions

Solid-liquid-vapor interactions method

Solid-liquid-vapor multicomponent system

Solid-liquid-vapor separators

Solid-liquid-vapor system, equilibrium condition

Solid-liquid-vapor systems

Solid-liquid-vapor three-phase

Solid-vapor equilibrium

Solid-vapor equilibrium line

Solid-vapor interface

Solid-vapor interfacial

Solid-vapor interfacial tension

Solid-vapor process

Solid-vapor systems

Solid-vapor-deposited metal-monomer

Solids solid-vapor phase transition

Sublimation and the Vapor Pressure of Solids

Surface energy solid-vapor

The vapor pressure of an isotropic solid particle

Vapor pressure curve solid particles

Vapor pressure of solids

Vapor pressure solids

Vapor-Solid Phase Reactions

Vapor-deposition solid-state synthesis

Vapor-liquid separators Solid deposition

Vapor-liquid-solid

Vapor-liquid-solid catalysis

Vapor-liquid-solid growth

Vapor-liquid-solid growth mechanism

Vapor-liquid-solid growth method

Vapor-liquid-solid growth, silicon

Vapor-liquid-solid mechanism

Vapor-liquid-solid method

Vapor-liquid-solid model

Vapor-liquid-solid process

Vapor-liquid-solid process, silicon carbide

Vapor-liquid-solid reaction process

Vapor-liquid-solid technique

Vapor-solid Adsorption, BET Theory

Vapor-solid growth method

Vapor-solid mechanism

Vapor-solid method

Vapor-solid process, silicon carbide

Vapor-solid process, silicon carbide whiskers

Vapor-solid reactions, catalyst

Vaporization of One Solid Reactant

Vapors, Liquids, and Solids

Variables of solid sampling with electrothermal vaporizers and atomizers

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