Modelling of phase transition by the heating

The contribution deals with modeling of heating process by phase transition. There are described real systems, which contain substances with multiple phases. Typical substance in raw material extracting and processing area is iron that in solid phase has a four modification. One phase is characterized usually with multiple temperature intervals for specific thermo chemical properties e.g. specific thermal capacity from the heating process point of view. For modeling was used service oriented architecture in web service form that provides selected thermo chemical data. There is described balance equation of iron heating model that implementation was realized in MATLAB environment. In MATLAB was realized function for load data to specific heat capacity computation using web service. Based on realized simulation are described achieve results. Last part of contribution deals with other possibility of web service extension in term of thermo chemical data providing and model of heating process by phase transition modifying.