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Rare Gibbs energy functions

The Gibbs energy functions and the electronic statistical multiplicities for the rare-earth monoxides. Chandrasekharaiah and Gingerich (1989). [Pg.442]

Many of the thermodynamic data presented in the following tables have been re-evaluated. The enthalpies of formation of carbon vapors are those given in JANAF tables (Stull and Prophet 1971). For example, AHIj(C, g) = 709.5 1.9kJ/mol has been used in these reevaluations. The table 10 presents the enthalpies of formation and the enthalpies of atomization for the rare-earth dicarbide vapors. The listed uncertainties are the best estimates taking into account the inaccuracies in the experimentally measured quantities such as the temperature, ion currents, pressure calibrations, etc., of the mass spectrometric data, and also due to the estimated values of the Gibbs energy functions. All the... [Pg.422]

A.ctivity Coefficients. Activity coefficients in Hquid mixtures are directiy related to the molar excess Gibbs energy of mixing, AG, which is defined as the difference in the molar Gibbs energy of mixing between the real and ideal mixtures. It is typically an assumed function. Various functional forms of AG give rise to many of the different activity coefficient models found in the Hterature (1—3,18). Typically, the Hquid-phase activity coefficient is a function of temperature and composition expHcit pressure dependence is rarely included. [Pg.236]

The thermodynamic data of the RBei3 and AnBeis compounds are reported in table 2. The enthalpies of formation of these compounds are presented in fig. 15 as a function of the atomic number of the rare-earth element or of the actinide. The values obtained by Ivanov and Tumbakov (1959) and Pyatkov et al. (1971) for the enthalpy of formation of UBei3 intermetallic compound are rather different. The values given for LaBe and CeBei3 are partial Gibbs energy of Be in the compound. The only conclusion which can be drawn is that the enthalpies of formation of UBe and PuBe arc less exothermic than that of YBe. ... [Pg.496]

Certain thermodynamic quantities may also serve for obtaining the preferential solvation of ions. The main quantity of interest in this respect is the standard molar Gibbs energy of transfer of the ion P from a source solvent (generally but not necessarily one of the components, say A) to the mixture A G °(I, A A+B) as a function of JCg. Rarely... [Pg.206]


See other pages where Rare Gibbs energy functions is mentioned: [Pg.374]    [Pg.534]    [Pg.44]    [Pg.231]    [Pg.499]    [Pg.42]    [Pg.258]    [Pg.335]    [Pg.56]    [Pg.9]    [Pg.9]    [Pg.414]    [Pg.520]    [Pg.267]   
See also in sourсe #XX -- [ Pg.442 ]




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Gibbs energy function

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