base function for region 5: g(p,T)
function g5 extends Modelica.Icons.Function; input SI.Pressure p "pressure"; input SI.Temperature T "temperature (K)"; output ThermalSeparation.Media.WaterBasedLiquid.BaseClasses.Common.GibbsDerivs g "dimensionless Gibbs funcion and dervatives wrt pi and tau"; end g5;