EXPERIMENTAL STUDY ON VAPOR PRESSURE AND CRITICAL PARAMETERS OF CH_3CF_3

Wang Huaixin; Li Zhong; Ma Yitai and Lu Canren(Thermal Energy Research Institute of Tianjain University; Tianjain 300072 )

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EXPERIMENTAL STUDY ON VAPOR PRESSURE AND CRITICAL PARAMETERS OF CH_3CF_3

更新时间：2025-12-16

- EXPERIMENTAL STUDY ON VAPOR PRESSURE AND CRITICAL PARAMETERS OF CH_3CF_3
- CIESC Journal Issue 3, (1993)
- 作者机构：
  
  天津大学热能研究所,天津大学热能研究所,天津大学热能研究所,天津大学热能研究所天津300072,天津300072,天津300072,天津,300072
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：25 June 1993，
  
  Published：25 June 1993
- 稿件说明：
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Wang Huaixin, Li Zhong, Ma Yitai and Lu Canren(Thermal Energy Research Institute of Tianjain University, et al. EXPERIMENTAL STUDY ON VAPOR PRESSURE AND CRITICAL PARAMETERS OF CH_3CF_3[J]. CIESC Journal, 1993, (3).
DOI：

Wang Huaixin, Li Zhong, Ma Yitai and Lu Canren(Thermal Energy Research Institute of Tianjain University, et al. EXPERIMENTAL STUDY ON VAPOR PRESSURE AND CRITICAL PARAMETERS OF CH_3CF_3[J]. CIESC Journal, 1993, (3). DOI：

摘要

测量了CH_3CF_3 230K以上的蒸汽压与临界参数.蒸汽压测量精度为|△T|≤28mk和|△р|≤1.4Pa

结果对文献蒸汽压方程呈明显偏差.基于汽液界面消失位置和临界乳光现象

测定了临界密度ρ_c=442±4kg/m~3、临界温度T_c=346.16±0.05K

由本文蒸汽压方程算出临界压力ρ_c=3.781±0.006MPa.文中还给出了一个新的正常沸点推算值T_b=225.69K.

Abstract

Sixty one vapor pressure data of CH3CF3 above 230K have been measured with a precision of |ΔT≤ 28mK

|Δp|≤ 1.4kPa

which showed

obvious deviation from references. The critical parameters were determined as ρc = 442± 4kg/ m3

TC = 346.16 ± 0.05K and pc = 3.781± 0.006MPa by observing the disappearance of vapor-liquid meniscus and the critical opalescence. The normal boiling point was predicted as Tb = 225.69K.

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