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.
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.
出处
《化工学报》
EI
CAS
CSCD
北大核心
1993年第3期373-377,共5页
CIESC Journal
基金
大津市21世纪青年科学基金资助项目
