Thermochemistry of Inorganic Solids. 5. Empirical Relations among Enthalpies of Formation of Oxides, Carbonates, Sulfates, Hydroxides, and Nitrates

摘要

Examination of the existing data of standard enthalpies of formation of solid metal oxides, carbonates, sulfates, hydroxides, and nitrates reveals the fact that the standard enthalpies of formation of any three compounds for a particular metal oxidation state can be correlated quantitatively two parameter linear equations. These equations are recast into linear equations which permit deducing delta H for monovalent and divalent metal salts from the delta H of their oxides and any of their oxides and any of their other salts. Considering the accuracy involved in the reference compounds, for different compounds of various metals examined the maximum absolute deviation is only 3 kcal/mol.