the standard hydrogen electrode for electrochemical reactions.
HSC even checks the elemental balance and gives potentials vs. HSC does all the above instantly - you simply type the reaction equation in the input field and HSC gives you the heat of the reactions, the equilibrium constant at any temperature and the amount of species.
This required a time-consuming search for this data with standard state conversions.
Traditionally, researchers have tested their ideas by writing out reaction equations, and then calculated equilibrium constants and heats of reactions from standard thermochemical data.