# A method for the accurate and smooth approximation of standard thermodynamic functions

## Description

Abstract A method is proposed for the calculation of approximations of standard thermodynamic functions. The method is consistent with the physical properties of standard thermodynamic functions. This means that the approximation functions are, in contrast to the hitherto used approximations, continuous and smooth in every temperature interval in which no phase transformations take place. The calculation algorithm was implemented by the SmoothSTF program in the C++ language which is part of this paper... Title of program: SmoothSTF Catalogue Id: AENH_v1_1 Nature of problem Standard thermodynamic functions (STF) of individual substances are given by thermal capacity at constant pressure, entropy and enthalpy. STF are continuous and smooth in every temperature interval in which no phase transformations take place. The temperature dependence of STF as expressed by the table of its values is for further application approximated by temperature functions. In the paper, a method is proposed for calculating approximation functions which, in contrast to the hitherto used a ... Versions of this program held in the CPC repository in Mendeley Data AENH_v1_0; SmoothSTF; 10.1016/j.cpc.2012.08.015 AENH_v1_1; SmoothSTF; 10.1016/j.cpc.2013.02.022 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2018)