.TILMedia.BaseClasses.PartialVLEFluidFunctions.vapourIsothermalCompressibility_phxi .TILMedia.BaseClasses.PartialVLEFluidFunctions.vapourIsothermalCompressibility_phxipartial function vapourIsothermalCompressibility_phxi = TILMedia.BaseClasses.PartialVLEFluidFunctionPrototypes.vapourIsothermalCompressibility_phxi;