Abstract
A new equation for determining the density of nonpolar substances based on measurements of dielectric constants is presented. Applying the new equation to nitrogen at a density from 1 to 30 mol·L−1, the mean deviation of the results calculated from the equation is of the order of 10−4, which is the same as the uncertainty of the experimental data. Owing to its analytical form, the derived equation can be applied to indicate the density of nonpolar substances with a densitometer, without adding error to the experimental uncertainty. This equation is also capable of determining the mean polarizabilities and molecular diameters, which agree well with results from other investigators. We suggest that the equation derived here can be applied to some other nonpolar substances as well.
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REFERENCES
A. D. Bunkingham and J. A. Pople, Trans. Faraday Soc. 51:1029 (1955).
J. Huot and T. K. J. Bose, Chem. Phys. 94:3849 (1991).
T. K. Bose and R. H. Cole, Chem. Phys. 52:140 (1970).
J. H. Achtermann, J. G. Hong, G. Magnus, R. A. Aziz, and M. J. Slaman, Chem. Phys. 98:2308 (1993).
W. M. Chen, L. Y. Li, B. P. Zhang, F. M. Wu, Z. Yu, and X. Jin, Rev. Sci. Instrum. 67:3631 (1996).
J. Smetana and W. C. Norman, NASA TN, D-6212 (1971).
C. J. F. Boettcher, Theory of Electric Polarization (Elsevier, New York, 1952).
J. C. D. Brand and J. C. Speakman, Molecular Structure (Edward Arnold, London, 1964), p. 224.
J. F. Ely and G. C. J. Straty, Chem. Phys. 161:1480 (1974).
R. Ouyang, X. Jin, and W. M. Chen, Acta Phys. Temp. Humills Sinica 6:1 (1984).
A. C. Newell and R. C. J. Baord, Appl. Phys. 136:3751 (1965).
R. C. Weast, CRC Handbook of Chemistry and Physics, 58th ed. (CRC Press, Boca Raton, L8901, 1978), p. F 195; 70th ed. (1989), p. D 190.
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Chen, W.M., Yu, Z. & Yao, X.X. An Equation for Calculating Nitrogen Density from Measurements of Dielectric Constants. International Journal of Thermophysics 19, 215–225 (1998). https://doi.org/10.1023/A:1021459304637
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DOI: https://doi.org/10.1023/A:1021459304637