Chapter 3 Properties Of Pure Substance 纯物质性质
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
\[ x=\frac{m_ \text { vopser }}{m _{to t a l}} \]
in the satured mixture region
\[ y = y_f+xy_g \]
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
\[ T_{R}={\frac{T}{T_{C r}} \quad P_{R}=\frac{P}{P_{C r}}} \]
- 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(reduced pressure)和折算温度(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
\[ (P+\frac a{V^2})(V-b) = RT \]
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