pt en

[P] = Pressure;
[T] = Temperature;
[v] = Specific volume;
[ρ] = Density;
[u] = Specific Internal Energy;
[h] = Specific Enthalpy;
[s] = Specific Entropy;
[cp] = Isobaric Specific Heat;
[cv] = Isocoric Specific Heat;
[w] = Sound Velocity;
[μ] = Viscosity;
[k] = Thermal conductivity;
[σ] = Surface Tension;
[ε] = Dieletric Constant;
[ic] = Ionization Constant.