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The static dielectric constant of CH3F and CHF3 to 468 K and 2000 bar

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  • Reuter, K.
  • Rosenzweig, S.
  • Franck, E.U.

Abstract

The static dielectric constant ϵ of methyl fluoride and trifluoromethane was measured between -60 and 195°C and from 50 to 2000 bar. (c(CH3F)=44.6°C, Tc(CHF3)=26.3°C.) The high pressure cell and procedure is described. At 20°C the ϵ-values for CH3F increase between 50 and 2000 bar from 9.7 to 15.9, and for CHF3 between 100 and 2000 bar from 7.2 to 12.7. At 2000 bar ϵ=8.0 (195°C) and ϵ=5.7 (205°C) are found for CH3F and CHF3, respectively. Functions for ϵ in dependence of pressure are given for both compounds. Estimated Kirkwood correlation factors g (between 1.0 and 1.2) deviate only moderately from unity.

Suggested Citation

  • Reuter, K. & Rosenzweig, S. & Franck, E.U., 1989. "The static dielectric constant of CH3F and CHF3 to 468 K and 2000 bar," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 156(1), pages 294-302.
    • Handle: RePEc:eee:phsmap:v:156:y:1989:i:1:p:294-302
    DOI: 10.1016/0378-4371(89)90124-6
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