Rationale on the standard enthalpies and entropies of formation of inorganic compounds and vaporisation of elements

The standard enthalpies and entropies of metal halides, oxides, sulphides, nitrides, phosphides and hydrides are shown to conform to various types of regularities with respect to the stoichiometric ratios mol compound/mol gas X-2 and atomic mass of the metals. The entropies of vaporisation of most elements are shown to be a simple function of temperature at the boiling and 1 atm vapour pressure.