New reference data on the thermodynamic properties of sodium vapor

Kuznetsova, O. D.; Semenov, A. M.

doi:10.1007/bf02755562

Cited by 5 publications

(11 citation statements)

References 1 publication

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“…One can see maxima of heat capacity and on the saturation line, which are not observed in tables for steam [50]. However, these maxima are given in other studies of the TDP of alkali metal vapors [3,21,22,51], and this behavior of heat capacity is apparently characteristic of dissociating gases. Tables 7 and 8 give confidence errors of calculated functions on the saturation line.…”

Section: Procedures and Results Of The Processing And Matching Of Datamentioning

confidence: 89%

A new equation of state for rubidium vapors at temperatures up to 1600 K and pressures up to 4 MPa

2006

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Statistical matching is performed of a wide range of diverse experimental data on the thermodynamic properties of saturated and superheated rubidium vapors at temperatures up to 1650 K. The parametric models used in the matching of data include the equation of state in the virial form and equations in the form of group expansions in terms of degrees of activity. Values of the second virial and group coefficients are obtained using new spectroscopic data on the singlet potential of rubidium atoms in the ground electron state. The equation of state in the form of expansion of density in terms of degrees of activity is used to calculate the tables of thermodynamic functions and estimate their confidence errors at temperatures up to 1600 K and pressures up to 4 MPa.

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Section: Procedures and Results Of The Processing And Matching Of Datamentioning

confidence: 89%

A new equation of state for rubidium vapors at temperatures up to 1600 K and pressures up to 4 MPa

2006

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“…(1) and (2), N A is the Avogadro number, k = 1.38066 × 10 -23 J/K is the Boltzmann constant, is the statistical sum of atom, and Naturally, formulas (1) and (2) do not include "diffraction" quantum effects and effects of quantum statistics. Under conditions in which the results of this study will presumably be employed, the appropriate quantum corrections are infinitesimal compared to the error of both calculation and measurement.…”

Section: Zakharova Semenovmentioning

confidence: 99%

“…The second group integral b 2 ( T ) of a gas consisting of atoms which may be in various electronic states is calculated by the formula (see [4] and references made there to previous studies) (1) where one must use the relation (2) for calculating the group function.…”

Section: Zakharova Semenovmentioning

confidence: 99%

“…Such an equation of state was previously constructed by us for potassium [1,2] and sodium [3] vapors. This equation has the form of group (by degrees of activity) expansions of pressure, density, and other thermodynamic functions.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, such a calculation may be performed with equally high accuracy at any temperatures, both within the domain in which data of thermophysical measurements are available and outside of this domain. Therefore, the quantity b 2 ( T ) theoretically calculated by molecular data was used in the semiempirical equation of state for alkali metal vapors [1][2][3], while the results of thermophysical measurements were used for estimating only the parameters which define the value and temperature dependence of higher group integrals b j ( T ), j ≥ 3. In what follows, the same approach will be employed in constructing the semiempirical equation of state for cesium vapor.…”

Section: Introductionmentioning

confidence: 99%

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The second group integral of cesium

Zakharova

Semenov

2008

High Temp

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The literature data on the interaction of two cesium atoms, obtained by processing the results of spectroscopic experiments and quantum-mechanical calculations, are used to calculate the second group integral of cesium at temperatures from 700 to 3000 K. The contributions made by atoms in the ground 2 S and first excited 2 P electronic states are taken into account. The contribution by the excited state is negligible at 1000 K, approximately 2% at 2000 K, and as significant as 20% at 3000 K. The error of calculation results is estimated to range from 0.3% at the lowest temperatures to 10% at the highest temperatures.

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Extrapolation of Liquid Sodium Properties to the Region of High Temperatures and Overheating

Usov

2023

High Temp

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New reference data on the thermodynamic properties of sodium vapor

Cited by 5 publications

References 1 publication

A new equation of state for rubidium vapors at temperatures up to 1600 K and pressures up to 4 MPa

A new equation of state for rubidium vapors at temperatures up to 1600 K and pressures up to 4 MPa

The second group integral of cesium

Extrapolation of Liquid Sodium Properties to the Region of High Temperatures and Overheating

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