کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
217469 | 1426331 | 2006 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Determination of standard Gibbs free energy of formation for Ca2P2O7 and Ca(PO3)2 from solid-state EMF measurements using yttria stabilised zirconia as solid electrolyte
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Determination of standard Gibbs free energy of formation for Ca2P2O7 and Ca(PO3)2 from solid-state EMF measurements using yttria stabilised zirconia as solid electrolyte Determination of standard Gibbs free energy of formation for Ca2P2O7 and Ca(PO3)2 from solid-state EMF measurements using yttria stabilised zirconia as solid electrolyte](/preview/png/217469.png)
چکیده انگلیسی
The equilibrium reactions: 3Ca2P2O7(s)+6Ni(s)⇄2Ca3(PO4)2(s)+2Ni3P(s)+52O2(g) and 2Ca(PO3)2(s)+6Ni(s)⇄Ca2P2O7(s)+2Ni3P(s)+52O2(g) were studied in the temperature range 890 K to 1140 K. The oxygen equilibrium pressures were determined using galvanic cells incorporating yttria stabilized zirconia as solid electrolyte. From the measured data and using the literature values of standard Gibbs free energy of formation for Ca3(PO4)2 and Ni3P, the following relationship of the standard Gibbs free energy of formation for Ca2P2O7 and Ca(PO3)2 were calculated:ΔfG∘(Ca2P2O7)±11/(kJ·mol-1)=-3475.9+1.5441(T/K)-0.1051(T/K)·ln(T/K)andΔfG∘(Ca(PO3)2)±12/(kJ·mol-1)=-3334.8+6.1561(T/K)-0.6950(T/K)·ln(T/K).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Journal of Chemical Thermodynamics - Volume 38, Issue 11, November 2006, Pages 1371–1376
Journal: The Journal of Chemical Thermodynamics - Volume 38, Issue 11, November 2006, Pages 1371–1376
نویسندگان
Malin Hannah Sandström, Dan Boström, Erik Rosén,