This Python program using tkinter package, generates GUI based NH3+H2O Enthalpy Concentration Chart.
The plot generation is based on the works of the following:
J Pátek, J Klomfar, Simple functions for fast calculations of selected thermodynamic properties of the ammonia-water system, International Journal of Refrigeration, Volume 18, Issue 4, 1995, Pages 228-234, ISSN 0140-7007, https://doi.org/10.1016/0140-7007(95)00006-W