Draft for extension and amendment ThermoChemDC web service

The web service ThermoChemDC is designed to address selected thermochemical calculations of chemical reactions for the purposes of process modelling in the acquisition and processing of raw materials. The first version of the web service contains the calculation of the heat capacity change, the calculation of the heat of reaction, the calculation of the change of entropy, the calculation of the Gibbs free energy, and the calculation of the logarithm of the equilibrium constant. Web services represent a shift from large monolithic applications structures to the components -based model. Web service is the dominant representative of service-oriented architecture, which is briefly described in the introductory part of the contribution. The second part of the article describes the purpose of ThermoChemDC web service. The main part of article is devoted to the proposal for extension of the ThermoChemDC web service. This section addresses five aspects of the web service functionality supplementing. The first aspect is the possibility of extending the calculations of the equilibrium partial pressures of the chemical equation; the second aspect is the further addition of new substances within the web service TermPropService. The third aspect specifies the new principle of the web service error states solution using separate database table with multiple language versions of descriptions the error status of the service. A fourth aspect is the proposal for a new method of service that provides detailed information about the service, its features and capabilities, about cooperating web services, input parameters, outputs and output structures and error states of the service. The fifth aspect is devoted to the adaptation of presentation client application. In conclusion, the results obtained are summarized and outlined the way forward in addressing the issue.