Standard Molar Formation Enthalpy of NH4Zn2PO4HPO4 and Its Standard Molar Formation Enthalpy

被引：0

作者：

Huang Runjun ^{[1
]}

Huang Zengwei ^{[2
]}

Song Baoling ^{[3
]}

Liao Sen ^{[3
]}

Wei Dongping ^{[2
]}

Yuan Aiqun ^{[2
]}

机构：

[1] Guilin Univ Technol Nanning, Nanning 530001, Guangxi, Peoples R China

[2] Guangxi Univ Nationalities, Sch Chem & Chem Engn, Key Lab New Technol Chem & Biol Transformat Proc, Nanning 530006, Guangxi, Peoples R China

[3] Guangxi Univ, Sch Chem & Chem Engn, Nanning 530006, Guangxi, Peoples R China

来源：

INTEGRATED FERROELECTRICS | 2015年 / 162卷 / 01期

关键词：

Ammonium dizinc phosphate(V); hydrogen phosphate(V); solid-state reaction at low temperature; standard molar enthalpy of formation; ZINC PHOSPHATES;

D O I：

10.1080/10584587.2015.1038133

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

NH4Zn2PO4HPO4 was synthesized by solid-state reaction at low temperature and characterized by XRD, FT-IR, TG and SEM. Thermochemical study was performed by an isoperibol solution calorimeter. According to Hess's law, a new thermochemical cycle was designed. The results show that the obtained products are NH4Zn2PO4HPO4 with layered compound. The decomposition temperatures begin at 303 degrees C, and the final product pyrolyzed at 800 degrees C is Zn2P2O7. With the dissolution enthalpies and other standard chemical data, the standard molar formation enthalpies of the NH4Zn2HPO4PO4 are worked out as follow: Delta H-f(m)(sic) [NH4Zn2PO4HPO4, s] = -2943.46 +/- 0.757 kJ.mol(-1).

引用

页码：46 / 54

页数：9

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