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