Equation of state for ionic liquids

Роганков, В. Б.

doi:10.1134/s0018151x0905006x

Cited by 13 publications

(24 citation statements)

References 13 publications

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“…Hence, such less correlated m-volumes ( m ) V can be attributed either to stable or to metastable f-points of an EOS-surface ( ) ρ P ,T only if their thermodynamic bounds are previously estimated. The well-established results performed by Hill [21], Rowlinson and Widom [32][33][34], Penrose and Lebowitz [35], Scripov [36], Lienhard and co-authors [1,2], Corti and Debenedetti [3] and by other investigators [5,6,[37][38][39][40][41][42][43] become relevant. Our aim below is to show that a common "Procrustean bed" of the unified EOS may be the serious restrictive feature of all above considerations especially in the extended CP-vicinity.…”

Section: Background Of a Unified Eos And Classical Metastability [1 2]mentioning

confidence: 97%

Mesoscopic metastable liquid in congruent vapor-liquid diagram of argon from about zero up to boyle`s temperature (review of FT-model)

Роганков¹,

Швець²,

Rogankov³

2021

ФАС

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Such paradigms of the coupled classical metastability and nonclassical criticality as the existence of a unified EOS (common for both gas and liquid phases) with its mean-field (mf), so-called Andrews-van der Waals’ critical point (CP) should be questioned to recognize the realistic stratified structure of a mesoscopic liquid phase. It exists supposedly in the wide range of temperatures located between about zero , K and up to the singular first Boyle’s point . Its opposite, also singular second Boyle’s point corresponds to the alternative origin for the crossover continuous bounds separating the specific structural strata of a mesoscopic liquid. The region of a heterogeneous l-phase spanning the whole temperature range can be termed the non-Gibbsian phase (due to its discrete cluster-like structure) without any appeals to the concept of a spinodal decomposition. The respective metastable liquid stratum is formed by three segments of supercritical , subcritical and sublimation metastable states of a formally incompressible liquid constrained by the pair of fixed extensive parameters (N,V). Its location on the CVL-diagram is restricted by the new introduced here ml-bound and by the known Zeno-line (ZL) bound. Thus, all above-mentioned strata belong to the region of soft fluid with the dominance of interparticle attraction. The remaining parts of CVL-diagram are spanned either by the real gas state-points and solid state-points (crystalline and/or amorphous) or by the region of hard fluid in the classification proposed by Ben-Amotz and Herschbach.

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Section: Background Of a Unified Eos And Classical Metastability [1 2]mentioning

confidence: 97%

Mesoscopic metastable liquid in congruent vapor-liquid diagram of argon from about zero up to boyle`s temperature (review of FT-model)

Роганков¹,

Швець²,

Rogankov³

2021

ФАС

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“…Its value for any ILs can be reasonably estimated [6,7] just from the long-range extrapolated "cold" volume V 0 = 1/ 0 0 ( → 0, 0 ). The choice of this work emphasizes that the "cold" volume for the variety of molecular and ionic liquids [7] should be always slightly less than the respective mf-estimate of 0 following from the unified vdW-EOS (the mf-estimate is impossible for ILs):…”

Section: Problem Of Input Low-temperature Datamentioning

confidence: 99%

“…The choice of this work emphasizes that the "cold" volume for the variety of molecular and ionic liquids [7] should be always slightly less than the respective mf-estimate of 0 following from the unified vdW-EOS (the mf-estimate is impossible for ILs):…”

Section: Problem Of Input Low-temperature Datamentioning

confidence: 99%

“…where coefficient 1.1 has [6,7] certain physical meaning. Indeed, the important, nearly linear correlations of V 0 ( ) for the wide groups of compounds have been revealed as is shown in Figure 2 and represented in Table 3 for 39 compounds.…”

Section: Problem Of Input Low-temperature Datamentioning

confidence: 99%

“…The determination of both is not trivial task for ILs [7] in which the vapor-pressure curve V ( ) is inaccessible by the standard lab. vacuum (∼10 −3 , Pa) experiment.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Scaling Model of Low-Temperature Transport Properties for Molecular and Ionic Liquids

Роганков

2015

Journal of Thermodynamics

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The universal scaling concept is applied to the low-temperature range of any liquid states and substances located between the melting ( ) and normal boiling ( ) points far away from the critical region. The physical reason to develop such approach is the revealed collapse of all low-temperature isotherms onto the single universal one argued by the model of fluctuational thermodynamics (FT) proposed recently by author. The pressure reduced by the molecular parameters of the effective short-range Lennard-Jones (LJ) potential depends here only on the reduced density. To demonstrate the extraordinary predictive abilities of the developed lowtemperature scaling model it has been applied to the prediction of equilibrium and transport (kinetic and dynamic viscosity, self-diffusion, and thermal conductivity) properties not only for molecular liquids but also for molten organic salts termed ionic liquids (ILs). The best argument in favor of the proposed methodology is the appropriate consistency with the scarce experiments prediction of transport coefficients for ILs on the base of universal scaling function constructed for the simplest LJ-like liquid argon. The only input data of any substance for prediction are the linear approximations of T-dependent density and isobaric heat capacity taken from the standard measurements at atmospheric pressure.

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