Impurity effects in a near-critical binary-fluid mixture

Tveekrem, J. L.; Jacobs, D. T.

doi:10.1103/physreva.27.2773

Cited by 77 publications

(38 citation statements)

References 19 publications

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“…The critical temperature drifted slightly from one run to the next, which we attribute to small impurities. 32 The effect of minute impurities on the critical point is principally seen as a shift in the critical temperature, with negligible effects on the critical composition, amplitude, or exponents. 32 Table I includes the critical temperature determined for each run.…”

Section: B Heat Capacitymentioning

confidence: 99%

Heat capacity and turbidity near the critical point of succinonitrile–water

Nowicki

Ghosh

McClellan

et al. 2001

The Journal of Chemical Physics

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Section: B Heat Capacitymentioning

confidence: 99%

Heat capacity and turbidity near the critical point of succinonitrile–water

Nowicki

Ghosh

McClellan

et al. 2001

The Journal of Chemical Physics

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“…The shift of T c is positive for all concentrations used in this study, which is an expected result that is well known for impurities [20]. Table 2 shows the shift of the critical temperature, which is obtained by the fit.…”

Section: Coexistence Curve Of Isobutyric Acid + Water With (Kcl) Saltmentioning

confidence: 87%

Critical behavior of the binary-fluid isobutyric acid-water with added ions ( , )

Toumi

Bouanz

2000

Eur. Phys. J. E

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Measurements of the coexistence curve of the binary-fluid mixture isobutyric acid + water with added KCl salt at various concentrations show an important dependence on the critical temperature and the critical exponent β. The phase-transition region shifts as a function of the salt concentration. The effective -critical exponent β * = (0.266-0.293) is neither compatible with the Ising value β = 0.325 nor with the Fisher renormalized value ∼ 0.365.

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“…Particularly water causes shifts of the critical temperature to higher values [13]. The purity of isooctane (Merck, per analysis) was better than 99%.…”

Section: Methodsmentioning

confidence: 99%

Dynamic Light Scattering of the Fluid‐Fluid Phase Transition in the Vicinity of the Critical Solution Point and in the First Order Transition Region

Schröer

Rybarsch

Strojny

et al. 1988

Ber Bunsenges Phys Chem

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Critical Phenomena / Light. Scattering / Liquids / Phase Transitions / Solutions Measurements of the Rayleigh-Brillouin spectra of the binary system nitroethane-isooctane have been carried out as function of temperature and concentration. The purpose of this investigation was to study the transition of one type of phase transformation to an other. Taking the temperature as variable, the phase transformation is of second order for one specific concentration -the critical concentration, whereas for other concentrations it is of first order. Samples deviating up to 20% from the critical composition have been investigated in the temperature range 10 to 10-3 K above the transition temperature in the homogeneous region. The temperature dependence of the Rayleigh-Brillouin intensity ratio 1,/2/ b can be described by the same critical exponent y = 1.24 for all concentrations provided the critical temperature in the scaling function is replaced by another reference temperature, interpreted as pseudo-spinodal temperature T s *' The concentration dependence of T s* is found to be IX -Xci = A· tt*, where t, is the reduced temperature t, = 1 -Ts*/T c. The value ofthe exponent is found to be P* = 0.5, which is the classical exponent of the spinodal curve.

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Impurity effects in a near-critical binary-fluid mixture

Cited by 77 publications

References 19 publications

Heat capacity and turbidity near the critical point of succinonitrile–water

Heat capacity and turbidity near the critical point of succinonitrile–water

Critical behavior of the binary-fluid isobutyric acid-water with added ions ( , )

Dynamic Light Scattering of the Fluid‐Fluid Phase Transition in the Vicinity of the Critical Solution Point and in the First Order Transition Region

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