1998 NIST-JANAF (National Institute of Standards and Technology-Joint Army Navy Air Force) Database Scanning and Plotting Program(DRC-021-024)

The 1998 NIST-JANAF (National Institute of Standards and Technology-Joint Army Navy Air Force) Database Scanning and Plotting Program is an interactive software application that contains fits of thermodynamic data contained in the Fourth Edition of the NIST-JANAF Thermochemical Tables. Fits for 1,068 common elemental and molecular species are contained within the database. The fitting coefficients provide predictive values covering a wide range of temperatures (in many cases for gas state species from 298.15 to 6,000 K). A total of 1,760 fits are included covering gas, solid, and liquid phases. Thermochemical properties that can conveniently be computed from the data fits include specific heat, entropy, enthalpy, free energy, and reduced free energy. The software is a Microsoft Excel-based application and allows extracted data to be used as inputs to other thermochemistry codes or used to compute thermochemical properties within Excel using supplied macros. Data fits can be extracted based on elemental composition or the fits for specific chemical species can be selected. Additionally, the program allows the user to plot both the original JANAF data and the associated fits of the thermochemical properties versus temperature. This can be helpful in visualizing the behavior of the thermodynamic properties.