Acta Phys. -Chim. Sin. ›› 1991, Vol. 7 ›› Issue (04): 467-470.doi: 10.3866/PKU.WHXB19910417

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Calorimetric Determination of the Heat of Formation of Competitive Ternary Complex Compounds

Lin Hua-Kuan; Gu Zong-Xin; Zhou Zhi-Fen; Chen Rong-Ti   

  1. Department of Chemistry, Nankai University, Tianjin 300071
  • Received:1990-02-01 Revised:1990-09-30 Published:1991-08-15
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Abstract: By utilizing the formation constants of Ni(Ⅱ)-Glycine binary complex compounds and the corresponding heats of formation from literature as well as the formation constants of Ni(Ⅱ)-Oxalate binary complex compounds and the corresponding heats of formation incorporating with the formation constants of Ni(Ⅱ)-Oxalate-Glycine competitive ternary complex compounds determined in our laboratory, the heats of formation of Ni(Ⅱ)-Oxalate-Glycine competitive ternary complex compounds have been determined at 25 ℃, I=0.1 mol·dm~(-3) (KNO_3) in aqueous solution by means of RD-1 model automatic conduction calorimeter. The results obtained are:
ΔH_(AB)~M=-14.3±2.0 kJ·mol~(-1)
ΔH_(A2B)~M=-27.0±2.0 kJ·mol~(-1)
ΔH_(AB2)~M=-40.2±2.0 kJ·mol~(-1)

Key words: Ternary complex compounds, Heats of formation, Calarimetric determination