摘要:

The electrical conductance of KC1 in glycerol solutions has been measured at concentrations between 1.5 mol m−3and 353 mol m−3at 22°C. The results are compared with the Fuoss paired ion model and fits to the data are obtained assuming a Gurney co-sphere having a radius in the approximate range 6 ± 10−10m to 9 ± 10−10m. The model leads to an estimate of ionic association which is less than that given by the theory of Bjerrum.

ISSN:0031-9104    

DOI:10.1080/00319108708078526

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor

摘要:

By using the Gibbs-Bogoliubov variational method, Bhatia and Young have recently provided an improvement on the Flory model of mixtures. The expression for the free energy of mixing arising from the Bhatia and Young approach is used to study the concentration fluctuationsScc(0) of the liquid Li-Pb alloy. It is shown that the experimental behaviour ofScc(0) can be explained within the framework of this theory if the ordering potential is assumed to vary strongly with concentration near the stoichiometric composition Li4Pb.

ISSN:0031-9104    

DOI:10.1080/00319108708078527

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor

摘要:

The evaluation of the osmotic pressure in terms of the concentration fluctuations of mixtures and the equations of state of the pure liquids is considered. The temperature and pressure dependent experimentally measured concentration-concentration correlations in the long wavelength limit of liquid sodium-cesium alloys are used to demonstrate the appreciable dependence of the temperature and pressure on the osmotic pressure as a function of concentration. Introducing interchange energies as functions of temperature and pressure, our analysis is consistent with the Flory model. Thus, a formalism for evaluating the state dependent osmotic pressure is developed and our numerical work is considered to be an extension of the calculations of Rashid and March in the sense that a temperature and pressure dependent interchange energy parameter that more closely parameterizes the state dependent concentration fluctuations in the liquid alloys, is used.

ISSN:0031-9104    

DOI:10.1080/00319108708078528

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor

摘要:

Average force and force-force correlation formulae both point to the same result that the mobility μ of electrons injected into dense gases like Ar, Xe, CH4and C2H6ought to exhibit at least gross regularities with respect to changes in gas densityn. This is the motivation for focussing here on the mobility minimum characterized bydμ/dn= 0. At this minimum, a formula for μminis obtained from which the scattering lengthahas been eliminated in favour of its density derivative (da/dn). This density derivative, it is argued, must have the formagasωt, where ωt, is a ‘characteristic volume for transport’ whileagasis the scattering length in the dilute gas limit. The Onsager continuum model, plus the Bottcher-Onsager formula for the dielectric constant, can be used as a first estimate of ωt, which is shown to be proportional to the cube of the ‘cavity radius’ in this model. The formula for μminis finally brought into direct contact with experiment.

ISSN:0031-9104    

DOI:10.1080/00319108708078529

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor

摘要:

Quantitative structure-activity relationships have been studied for the aqueous solubility of 42 halogenated benzenes (HBs) at 25°C. Multiple regression correlations of aqueous mole fraction solubility (X) with molecular size descriptors (total molecular surface area, total group surface area, molecular volume or molecular weight), melting point temperature (MP) and a combined molecular symmetry and structure descriptor(R. Molecular size descriptor) are reported. A generalized correlation takes the form of

ISSN:0031-9104    

DOI:10.1080/00319108708078530

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor

摘要:

In recent years a number of high quality measurements, at different state parameters, of the dynamic structure factor have been made. These measurements justify two new interpretive approaches. In the first we deduce the magnitude and frequency dependence of the memory function of the current-current correlation function without performing the theoretically correct, but errorful, Fourier-Laplace double transform procedure. This can be achieved1,2at a number of special points, and is essentially a direct measurement of this quantity in momentum-frequency space. For the first time the properties of collective modes in fluids can be discussed in a systematic way and this is done for dense krypton gas and for liquid argon.

ISSN:0031-9104    

DOI:10.1080/00319108708078531

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor

摘要:

One-component plasma model is applied for predicting thermal pressure coefficients √vof liquid polyvalent metals at their melting points. The results are compatible with those obtained by other methods or experiments.

ISSN:0031-9104    

DOI:10.1080/00319108708078532

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor

摘要:

Intermolecular interactions in liquids are proposed to give rise to dynamic structures which are propagated as a wave through the medium. In the pure solvent the wavelength of this motion, which determines the size of the oscillating clusters, is set by the thermodynamic conditions. However, the presence of solutes shortens the wavelength thus decreasing cluster size. At the solvent-solution boundary the differently sized clusters interact to bring about equilibrium. This picture provides us with a simple interpretation of osmotic effects.

ISSN:0031-9104    

DOI:10.1080/00319108708078533

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor

摘要:

It is proposed that the occurrence of colligative phenomena is a result of structured aggregates of solvent molecules which exist within the liquid medium. In a solution these formations are smaller than in the pure solvent. Using simple kinetic arguments it is shown how this difference in cluster size shifts the equilibria which establish vapour pressure, as well as the boiling and freezing points.

ISSN:0031-9104    

DOI:10.1080/00319108708078534

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor

摘要:

This is a scanned image of the original Editorial Board page(s) for this issue.

ISSN:0031-9104    

DOI:10.1080/00319108708078525

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor