CommentFigure shows only the first heating process. Sulfidation reaction starts at 405, and continues till 645. There exist two exothermic peaksiPj405-580@(peak top, at 544)iQj580-645@(peak top, at 620): Total enthalpy of reaction amounts to@’Hr=1646J/g.
The enthalpy of formation@Product is the trigonal
TiS2.
Other coexisted phase is the hexagonal Ti.
The enthalpy of formation becomes ’Hf=63Kcal/mol.
