To make studying thermodynamics and thermochemistry more engaging ChemChallenge was developed. This applica on so ware implements drag-and-drop and graphic user interface (GUI) to model feasibility of chemical reac ons by compu ng their enthalpy (∆H 0 ), entropy (∆S 0 ) and Gibbs free energy change (∆G). The main objec ve of this applica on so ware is to provide a digital tool, which students could use to apply their theore cal knowledge to create reac ons equa ons describing spontaneous chemical reac ons.