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Volume 7 Issue 1
Oct.  2021
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Article Contents
Zhang Yun, Li Wenchao, Zhu Yuankai. Activity Calculation in Binary System containing Compounds from Standard Heat of Formation of Compounds[J]. Chinese Journal of Engineering, 1985, 7(1): 73-79. doi: 10.13374/j.issn1001-053x.1985.01.021
Citation: Zhang Yun, Li Wenchao, Zhu Yuankai. Activity Calculation in Binary System containing Compounds from Standard Heat of Formation of Compounds[J]. Chinese Journal of Engineering, 1985, 7(1): 73-79. doi: 10.13374/j.issn1001-053x.1985.01.021

Activity Calculation in Binary System containing Compounds from Standard Heat of Formation of Compounds

doi: 10.13374/j.issn1001-053x.1985.01.021
  • Available Online: 2021-10-29
  • According to the method of activity calculation in binary system containing compounds from standard entropy of formation of compounds[1], further using the standard heat of fo rmationof compounds, we deduced the new formula which was also for the compound system. The new formula is\[{\rm{dln}}{{\rm{\gamma }}_{\rm{A}}}{\rm{= - }}\frac{{{\rm{\Delta }}{{\rm{H}}_{\rm{f}}}^{\rm{0}}{{\rm{N}}_{\rm{B}}}}}{{{\rm{R}}{{\rm{T}}^{\rm{2}}}{\rm{(x}}{{\rm{N}}_{\rm{B}}}{\rm{ - y}}{{\rm{N}}_{\rm{A}}}{\rm{)}}}}{\rm{dT - dln}}{{\rm{N}}_{\rm{A}}}\;\;\;\;\;\;\;\;(1)\]here ΔHf0 is standard heat of formation of compounds; x,y.is stoichi-ametric factors of the component A,B respectively; NA NB is mole fraction of the components A. B respectively; γA. γB is activity coefficient of components A,B at liquidus temperature.
    In the binary system Au-B1 the activity values calculated by our fo-mula and by Chou's formula are compared with the measured values. They were very well in agreement on the values.
    In this paper the values of the binary system Al-La is calculated using our new formula. The results are discussed briefly.

     

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      沈陽化工大學材料科學與工程學院 沈陽 110142

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