Chapter 3 Properties Of Pure Substance 纯物质性质

Summary

基础概念

  • Liquid: compressed liquid 过冷水
  • gaz: super-heated gaz 过热气
  • phase change process 相变
  • Saturation temperature 温度保和
  • saturation pressure 饱合压力
  • Satured Liquide 饱合液体
  • Satured vaper 饱合气体
  • Critical point 三相点

quality 质量分数

in the satured mixture region

理想气体

Ideal-gaz equation

  • $PV = RT$
  • constant of air: $R = 8.314 kPa\cdot m^3/mol\cdot k = \ pour\ air \ = 0.287 kPa\cdot m^3/kg\cdot k$

compressible factor 压缩系数

  • $Z=\frac{P V}{R T}$

reduced pressure, reduced temperature 折算压力/温度

  • 各种气体的性质又不相同,为了统一计算,这里引入折算压力\对比压力(reduced pressure)折算温度\对比温度(reduced temperature)
  • 其中$P{cr}$和$T{cr}$分别代表临界压力和临界温度

范德华气体方程