Simultaneous analysis of the enthalpy increment and heat capacity data measurements for updating the IVTANTHERMO database

Abstract

Abstract An analysis of the enthalpy increment and heat capacity data measurements is required for developing thermodynamic databases such as the IVTANTHERMO database created in the Glushko Thermocenter of JIHT RAS. A new CondensedThermoFit code is developed which provides experts with a comprehensive set of analysis tools for working with data on the specific heat and enthalpy increments for substances in the condensed state. These tools include simultaneous approximation of these two types of data. The enthalpy increment data is treated using the Shomate method while the heat capacity data is fitted with a flexible and manually constructible function. Only polynomial-like fitting functions are implemented so far. The final results are ready for exporting into the database with a fixed form of the fitting function such as the IVTANTHERMO database. The code has a cross-platform design, extensible module structure and graphical user interface.