Vapor-liquid coexistence curve and the critical parameters of 1-chloro-1, 1-difluoroethane (HCFC-142b)

Selsho Tanikawa, Jun Tatoh, Yukishige Maezawa, Haruki Sato, Koichi Watanabe

Research output: Contribution to journalArticle

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Abstract

Vapor-liquid coexistence curve near the critical point of 1-chloro-1, 1-difluoroethane (HCFC-142b) was measured by a visual observation of the meniscus in an optical cell. Saturation densities including 13 saturated-vapor and 18 saturated-liquid densities were obtained in the range of temperature from 354 K to the critical temperature, corresponding to the density range from 181 to 947 kg/m3. The experimental errors in temperature and density were estimated to be within ±10 mK and between ±0.09 and ±0.53%, respectively. Not only the level where the meniscus disappeared but also the intensity of the critical opalescence were considered for the determination of the critical temperature and density as 410.29 ± 0.02 K and 446 ± 3 kg/m3, respectively. The critical exponent, β, was also determined to be 0.339 ± 0.002. A saturated-vapor/saturated-liquid density correlation was developed on the basis of the presnt measurements.

Original languageEnglish
Pages (from-to)74-76
Number of pages3
JournalJournal of Chemical and Engineering Data
Volume37
Issue number1
Publication statusPublished - 1992 Jan

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Vapors
Density of liquids
Liquids
Temperature
Density (specific gravity)
1-chloro-1,1-difluoroethane

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)

Cite this

Vapor-liquid coexistence curve and the critical parameters of 1-chloro-1, 1-difluoroethane (HCFC-142b). / Tanikawa, Selsho; Tatoh, Jun; Maezawa, Yukishige; Sato, Haruki; Watanabe, Koichi.

In: Journal of Chemical and Engineering Data, Vol. 37, No. 1, 01.1992, p. 74-76.

Research output: Contribution to journalArticle

Tanikawa, S, Tatoh, J, Maezawa, Y, Sato, H & Watanabe, K 1992, 'Vapor-liquid coexistence curve and the critical parameters of 1-chloro-1, 1-difluoroethane (HCFC-142b)', Journal of Chemical and Engineering Data, vol. 37, no. 1, pp. 74-76.
Tanikawa, Selsho ; Tatoh, Jun ; Maezawa, Yukishige ; Sato, Haruki ; Watanabe, Koichi. / Vapor-liquid coexistence curve and the critical parameters of 1-chloro-1, 1-difluoroethane (HCFC-142b). In: Journal of Chemical and Engineering Data. 1992 ; Vol. 37, No. 1. pp. 74-76.
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