Elements, list error sources

Ideal gas absolute entropies of many compounds may be found in Daubert et al.,"" Daubert and Danner," JANAF Thermochemical Tables,TRC Thermodynamic Tables,and Stull et al. ° Otherwise, the estimation method of Benson et al. " is reasonably accurate, with average errors of 1-2 J/mol K. Elemental standard-state absolute entropies may be found in Cox et al." Values from this source for some common elements are listed in Table 2-389. ASjoqs may also be calculated from Eq. (2-52) if values for AHjoqs and AGJoqs are known. 

To compare the elemental distribution ratio betweoi the condoised zinc and the matte from the different tests, these were also normalized to Pzn = 0.1 atm for all tests by assuming (normalized distribution ratio at 0.1 atm zinc partial pressure) = (measured distribution ratio Pzn / 0.1) as listed in Table IV. In general, the scatter of the estimated distribution ratio is large. This is not surprising if we recognize the many sources of variation different temperatures, different degrees of splashing caused by different feed rates and gas flow rates, aiuilytical errors and even different matte compositions. 

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