Abstract
The measurements of the vapor-liquid coexistence curve in the critical region for R 114 (C2Cl2F4) were made by visual observation of the disappearance of the meniscus at the vapor-liquid interface within an optical cell. Twenty-three saturated densities between 410 K and critical temperature were obtained in the range of densities 290 to 894 kg/m3. The experimental errors of temperature and density were estimated within ±15mK and ±0.5%, respectively. On the basis of these results, the critical temperature Tc and the critical density ρc for R 114 were determined to be 418.78 K and 576 kg/m3, respectively, in consideration of the disappearing meniscus level as well as the intensity of the critical opalescence. The critical pressure Pc for R 114 was calculated to be 3.252 MPa by the available vapor-pressure correlation with the present value of Tc. In addition, the critical exponent β and the law of rectilinear diameter near the critical point were also discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 1327-1333 |
| Number of pages | 7 |
| Journal | Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B |
| Volume | 51 |
| Issue number | 464 |
| DOIs | |
| Publication status | Published - Jan 1 1985 |
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All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Mechanical Engineering
Cite this
Measurements of the Vapor-Liquid Coexistence Curve and Determination of the Critical Parameters for R 114. / Higashi, Yukihiro; Uematsu, Masahiko; Watanabe, Koichi.
In: Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, Vol. 51, No. 464, 01.01.1985, p. 1327-1333.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Measurements of the Vapor-Liquid Coexistence Curve and Determination of the Critical Parameters for R 114
AU - Higashi, Yukihiro
AU - Uematsu, Masahiko
AU - Watanabe, Koichi
PY - 1985/1/1
Y1 - 1985/1/1
N2 - The measurements of the vapor-liquid coexistence curve in the critical region for R 114 (C2Cl2F4) were made by visual observation of the disappearance of the meniscus at the vapor-liquid interface within an optical cell. Twenty-three saturated densities between 410 K and critical temperature were obtained in the range of densities 290 to 894 kg/m3. The experimental errors of temperature and density were estimated within ±15mK and ±0.5%, respectively. On the basis of these results, the critical temperature Tc and the critical density ρc for R 114 were determined to be 418.78 K and 576 kg/m3, respectively, in consideration of the disappearing meniscus level as well as the intensity of the critical opalescence. The critical pressure Pc for R 114 was calculated to be 3.252 MPa by the available vapor-pressure correlation with the present value of Tc. In addition, the critical exponent β and the law of rectilinear diameter near the critical point were also discussed.
AB - The measurements of the vapor-liquid coexistence curve in the critical region for R 114 (C2Cl2F4) were made by visual observation of the disappearance of the meniscus at the vapor-liquid interface within an optical cell. Twenty-three saturated densities between 410 K and critical temperature were obtained in the range of densities 290 to 894 kg/m3. The experimental errors of temperature and density were estimated within ±15mK and ±0.5%, respectively. On the basis of these results, the critical temperature Tc and the critical density ρc for R 114 were determined to be 418.78 K and 576 kg/m3, respectively, in consideration of the disappearing meniscus level as well as the intensity of the critical opalescence. The critical pressure Pc for R 114 was calculated to be 3.252 MPa by the available vapor-pressure correlation with the present value of Tc. In addition, the critical exponent β and the law of rectilinear diameter near the critical point were also discussed.
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U2 - 10.1299/kikaib.51.1327
DO - 10.1299/kikaib.51.1327
M3 - Article
AN - SCOPUS:0022047179
VL - 51
SP - 1327
EP - 1333
JO - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
JF - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
SN - 0387-5016
IS - 464
ER -