10:2410:24, 18 July 2009diffhist+694
Pertechnetate
Added references for 2 previously unreferenced items and removed an unreferenced relatively unimportant point. Also fixed grammatical errors.
06:2106:21, 15 July 2009diffhist−43
Hess's law
Latex'd some formulas and changed standard state symbol to the plimsoll for consistency. Also removed the duplicate formula.