ISSN:
1572-9567
Schlagwort(e):
dissociation
;
enthalpy
;
germanium
;
lead
;
molar volume
;
saturated vapor
;
silicon
;
tin
;
vapor pressure
;
vaporization
;
virial equation
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Physik
Notizen:
Abstract Thermodynamic characterization of silicon, germanium, tin, and lead vaporization is performed by the method applied earlier to alkali metals and carbon, i.e., by evaluation of analytical expressions representing dependence of the second virial coefficient and vapor pressure on temperature. Starting from saturation pressure values given as a sum of partial pressure of present species, through a modified procedure applied before to carbon, the parameters of anticipated forms ofB=f(T) andP=f(T) are optimized with very high degree of correlation. A new, simple, and efficient procedure for optimization ofP=f(T) parameters from particularP data is derived. The values of $$\Delta _\upsilon H_0^0 \left( {III} \right)$$ and $$\Delta _\upsilon H_0^0 \left( {II} \right)$$ , calculated for all the elements from the evaluated relationsB=f(T) andP=f(T), agree mutually as well as with thecodata recommended values. Applicability and efficiency of this method when applied to thermodynamic characterization of vaporization of the fourth group elements is justified through comparison of the obtained vapor pressure and saturated vapor molar volume values with the corresponding values deduced from the published data.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF01178785
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