Determination of the Vapour Pressure of Solutions. II

Niwa, Koichi; Shimazaki, Eiichi

doi:10.1246/nikkashi1921.60.985

Cited by 3 publications

(4 citation statements)

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“…A discussion of the diaphragm method using columbium alloy for measuring vapor pressures at temperatures to 2400°F was presented by Stone et al (10). The present study has shown that this method may be successfully extended to at least 3400°F with use of tantalum alloys.…”

supporting

confidence: 51%

“…A review of a previous paper, where a closed-chamber diaphragm method (10) was also used, suggested that the depression phenomenon observed at the intersection of the saturation and superheat curves might be explained by a combination of effects-an undetected temperature gradient along the axis at the lower extremity of the measurement chamber (at the filling tube) and the diminishing amount of liquid phase. This possibility was checked experimentally in the low temperature system (10) by making saturation measurements in this region with a thick metal cap installed over the filling tube and by inducing large temperature gradients along the axis of the chamber. The results of these tests showed conclusively that the vapor pressure lowering was not associated with thermal gradients on the apparatus.…”

mentioning

confidence: 99%

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Vapor pressure of deuterated water from 106 to 300.deg.

Liu¹,

Lindsay²

1970

J. Chem. Eng. Data

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supporting

confidence: 51%

mentioning

confidence: 99%

Vapor pressure of deuterated water from 106 to 300.deg.

Liu¹,

Lindsay²

1970

J. Chem. Eng. Data

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“…4. For the sake of completeness, the data of Niwa and Shimazaki 42 are shown in addition to the datasets mentioned above, although they comprise only three data points of lower accuracy. Within the deviation plot in the bottom panel (as in all other deviation plots in this article), data points shown at the upper or lower vertical limits of the diagram indicate that the points are off scale.…”

Section: Sublimation-pressure Equationmentioning

confidence: 99%

A Reference Equation of State for Heavy Water

Herrig

Thol

Harvey

et al. 2018

Journal of Physical and Chemical Reference Data

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An empirical fundamental equation of state (EOS) is presented for fluid heavy water (deuterium oxide, D 2 O). The equation is explicit in the reduced Helmholtz energy and allows the calculation of all thermodynamic properties over the whole fluid surface. It is valid from the melting-pressure curve up to a temperature of 825 K at pressures up to 1200 MPa. Overall, the formulation represents the most accurate measured values and almost all other available data within their experimental uncertainty. In the homogeneous liquid and vapor phase, the expanded relative uncertainties of densities calculated from the EOS are mostly 0.1% or less; liquid-phase densities at atmospheric pressure can be calculated with an uncertainty of 0.01%. The speed of sound in the liquid phase is described with a maximum uncertainty of 0.1%; the most accurate experimental sound speeds are represented within their uncertainties ranging from 0.015% to 0.02%. In a large part of the liquid region, the isobaric heat capacity is represented with an uncertainty of 1%. The uncertainty in vapor pressure is mostly within 0.05%. In the critical region, the uncertainties of calculated properties are in most cases higher than the values above, but the EOS enables a reasonable description of this region. The equation matches available data for the metastable subcooled liquid, and it extrapolates in a qualitatively correct way to extreme values of temperature and pressure. This formulation is the result of an effort to establish a new standard for the thermodynamic properties of heavy water by the International Association for the Properties of Water and Steam.

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“…Moreover, currently a thermodynamic integration approach to the supercooled vapor pressure of D2O is not possible due to the lack of high-accuracy triple-point pressure knowledge. Most of the experimental data available in literature [2][3][4][5][6][7][8][9][10][11][12][13][14][15] concerns the saturation vapor pressure of stable liquid D2O, which is often reported as difference or ratio with respect to ordinary water. It is worth mentioning the first saturation vapor pressure data provided in the '30s by Lewis and MacDonald [8] and Miles and Menzies [9].…”

Section: Introductionmentioning

confidence: 99%