Reference

Enthalpy of solution of dipotassium orthophosphate at 25°C

Enthalpy of solution of dipotassium orthophosphate at 25°C. Luff, Basil B.; Reed, Robert B. (Div. Chem. Dev., Tennessee Val. Auth., Muscle Shoals, Ala., USA). J. Chem. Eng. Data, 23(1), 56-8 (English) 1978. CODEN: JCEAAX. DOCUMENT TYPE: Journal CA Section: 69 (Thermodynamics, Thermochemistry, and Thermal Properties) Measurements were made of the enthalpy of soln. at 25° of dipotassium orthophosphate [7758-11-4] in water over the concn. range 0.06-2.33 m. Measurements also were made of the enthalpies of diln. to near infinite diln. of dipotassium orthophosphate solns. ranging from 3.12 to 9.99 m. The results were combined to det. the enthalpy of soln. over the entire concn. range, and the partial molal heat contents were derived.

Standard enthalpies of formation of monopotassium and dipotassium orthophosphate

Standard enthalpies of formation of monopotassium and dipotassium orthophosphate. Luff, Basil B.; Reed, Robert B. (Div. Chem. Dev., Tennessee Val. Auth., Muscle Shoals, Ala., USA). J. Chem. Eng. Data, 23(1), 60-2 (English) 1978. CODEN: JCEAAX. DOCUMENT TYPE: Journal CA Section: 69 (Thermodynamics, Thermochemistry, and Thermal Properties) The std. enthalpies of formation of KH2PO4 [7778-77-0] and K2HPO4 [7758-11-4] are -376.1 and -425.4 kcal/mol-1, resp. They were detd. from the enthalpies of soln. of KCl, H3PO4.13.88H2O, H3PO4.1.5H2O, KH2PO4, K2HPO4, and H2O in 4 m HCl at 25°, the std. enthalpies of formation of KCl, aq. HCl, and H3PO4.100H2O, and the enthalpies of diln. of H3PO4 solns.