"The heat capacity of a solid compound is approximately equal to the sum of the heat capacities of the constituentelements.
" This is the statement of
Law of Petit and Dulong
Nearnst heat theorem
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Phosphoric acid is produced in wet process from phosphate rock and
The fugacity of liquid water at 298 K is approximately 3171 Pa. Considering the ideal heat of vaporisation as 43723 J/gm mole, its fugacity at 300 K would be
Sodium tri poly phosphate (STPP) is manufactured by reaction of phosphoric acid with sodium