Critical Constants (van der Waals) (Vc=3b; Pc=a/(27b²); Tc=8a/(27Rb): molar vdW form)
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Vc=3b; Pc=a/(27b²); Tc=8a/(27Rb) — molar vdW form
What each symbol means
| Symbol | What it stands for |
|---|---|
| R | Gas constant |
| a,b | van der Waals constants (consistent with (P+a/Vm²)(Vm−b)=RT) |
| Vc,Pc,Tc | Critical molar volume, pressure, temperature |
When to use this
Derived from van der Waals equation in molar form; qualitative for real fluids.