Synthesis and Standard Molar Formation Enthalpy of Plate Shape NaZnPO₄·H₂O

Abstract:

Plate shape NaZnPO4·H2O was synthesized by solid-state reaction at low temperature and characterized by X-Ray Diffraction, Scanning electron microscope and elemental analysis. Thermochemical study was performed with an isoperibol solution calorimeter. Based on Hess’s law, thermochemical cycl was designed to determine the dissolution enthalpies of reactants and products using a solution-reaction isoperibol calorimeter at 298.15 K, and the molar reaction enthalpy was calculated on the basis of above dissolution enthalpies. The results show that the obtained product is plate shape NaZnPO4·H2O. The standard molar formation enthalpy of the NaZnPO4·H2O is ΔfHm [NaZnPO4·H2O,s]= -1967.18 ± 0.69 kJ•mol-1.

• Periodical: Applied Mechanics and Materials (Volumes 121-126)
• Pages: 175-180
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.121-126.175
• Online since: October 2011
• Authors: Shao Mei Ma, Sheng Fu Wu, Zeng Wei Huang, An Ping Liao, Ai Qun Yuan
• Keywords: Sodium Zinc Phosphate, Solid-State Reaction at Low Temperature, Standard Molar Formation Enthalpy

References

[1] S.N. Le, N. Alexandra. Energetics of phosphate frameworks containing zinc and cobalt: NaZnPO4, NaH(ZnPO4)2, NaZnPO4·H2O, NaZnPO4·4/3H2O, and NaCoxZn1−x PO4·4/3H2O Journal of Solid State Chemistry, VOL. 180(2007), p.2443.

DOI: 10.1016/j.jssc.2007.06.017

[2] W. T. A. Harrison, T. E. Gier, G. D. Stucky, R. W. Broach, R. A. Bedard.: NaZnPO4. H2O an open-framework sodium zincophosphate with a new chiral tetrahedral framework topology . Chem. Mater, vol. 8(1996), p.145.

DOI: 10.1002/chin.199618012

[3] T.S. Wang, S. Liao, X. Chen, K. Wu, X.Z. Tian: Michael Addition Reaction Catalyzed by KF/NaZnPO4, Technology & Development of Chemical Industry, vol. 37(2008), p.1.

[4] L.C. Zhou, H.T. Wu, S. Liao, W.W. Wu, Y.B. Sun, X.Z. Tian: Synthesis and regulation of chiral sodium zincophosphate via low heat solid state reaction, Journal of Chemical Industry and Engineering (China), vol. 59 (2008), p.2401.

[5] S. Liao, X.Z. Tian, X. Chen, G. Liu: Knoevenagel condensation catalyzed by sodium zinc phosphate, Journal of Guangxi University (Natural Science Edition), vol. 33 (2008), p.53.

[6] A.Q. Yuan, J. Wu, Z.Y. Huang, K. Wu, S. Liao, Z. F. Tong: Synthesis of NH4FePO4. H2O nano-plates via solid-state reaction at low temperature and its thermochemistry properties, Mater. Res. Bull. ，vol. 43 (2008), p.1339.

DOI: 10.1016/j.materresbull.2007.09.022

[7] A.Q. Yuan, J. Wu, L.J. Bai, S. M. Ma, Z. Y. Huang, Z. F. Tong: Standard Molar Enthalpies of Formation for Ammonium/ 3d-Transition Metal Phosphates NH4MPO4·H2O (M = Mn2+, Co2+, Ni2+, Cu2+), J. Chem. Eng. Data, vol. 53(2008), p.1066.

DOI: 10.1021/je700385x

[8] V. Kiiday Marthada: Jourmal of RESEARCH of the National Bureau of Standard, vol. 85 (1980), p.467.

[9] Dean, J. A. Lange's Handbook of Chemistry (11th), Chapter 9, McGraw-Hill: New York (1973).

[10] R. C. Weast: CRC Handbook of Chemistry and Physics 70th Edn. Florida, D-121, CRC Press Inc (1988/1989).

[11] John A Dean. Lange's Handbook of Chemistry (15th), chapter, 6, World publishing corporation at Beijing (1999).