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Acta Phys. -Chim. Sin.  2001, Vol. 17 Issue (03): 245-247    DOI: 10.3866/PKU.WHXB20010312
Note     
Thermochemical Studies on the LangbeiniteType Double Sulfate Salts,(NH4)2Cd2(SO4)3 and K2Cd2(SO4)3
Zhou Ya-Ping;Zhang Rui;Wan Hong-Wen;Zhan Zheng-Kun;Xu Ming-Fei
Department of Chemistry,Central China Normal University,Wuhan 430079
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Abstract  The standard molar formation enthalpies of (A+)2Cd2(SO4)3[A+ is NH+ 4 or K+] are determined from the enthalpies of dissolution (ΔsHm) of [(A+)2SO 4(s)+2CdSO4(s)] and (A+)2Cd2(SO4)3(s) in twice distilled water or 3 mol•L-1 HNO3 solvent respectively,at 298.2 K,as: ΔfHm [(NH4)2Cd2(SO4)3,s,298.2K]=-3031.74±0.08 kJ•mol-1 ΔfHm [K2Cd2(SO4)3,s,298.2K]=-3305.52±0.17 kJ•mol-1

Key wordsDouble sulfate salts      Solution calorimetry      The standard molar enth alpy of formation     
Received: 06 July 2000      Published: 15 March 2001
Corresponding Authors: Wan Hong-Wen   
Cite this article:

Zhou Ya-Ping;Zhang Rui;Wan Hong-Wen;Zhan Zheng-Kun;Xu Ming-Fei. Thermochemical Studies on the LangbeiniteType Double Sulfate Salts,(NH4)2Cd2(SO4)3 and K2Cd2(SO4)3. Acta Phys. -Chim. Sin., 2001, 17(03): 245-247.

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http://www.whxb.pku.edu.cn/10.3866/PKU.WHXB20010312     OR     http://www.whxb.pku.edu.cn/Y2001/V17/I03/245

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