求助：低温下（-20℃~）醇的饱和蒸汽压？4楼的温度更正为：n(p/mmHg)=A-B/(T/K+C)Antoine Constants and the corresponding temperature regionA? ?? ?? ?? ?? ?B? ?? ?? ?? ?C? ?? ???Tmin /K? ?? ?? ? Tmax /K? ?? ???8.13484? ? ? ?? ?1662.48? ? ? ? 238.131? ? ? ?? ???159.05? ?516.25------------------------------------------------------------------------------------------------下面给出另外一种形式的Antoine参数，参数越多，计算的精度相对较高。Title:??Yaws' Handbook of Thermodynamic and Physical Properties of Chemical CompoundsTable:??Vapor Pressure Cited from “Yaws, C. L., Yaws' Handbook of Thermodynamic and Physical Properties of Chemical Compounds. 2003. Online version available at: http://knovel.com/web/portal/bro ... 67&VerticalID=0 ”-------------------------------------------------------------------------Row (Record) Number:??1969ethyl alcohol or ethanol; CAS Registry No. 64-17-5 mol. Formula C2H6O mol. Weight 46.069 g.mol-1-------------------------------------------------------------------------The correlation for vapor pressure as a function of temperature is given by: ? ? ? ? ? ? ? ? log10 P = A +??B/T + C log10 T + D T + E T2? ? ? ? ? ? ? ? Eq. 1? ? ? ? ? ? ? ? where? ? ? ? ? ? ? ? P = vapor pressure, mm Hg? ? ? ? ? ? ? ? A, B, C, D, and E = regression coefficients for chemical compound? ? ? ? ? ? ? ? T = temperature, K The results for vapor pressure are given in the live table.? ? The tabulated values are based on regression of experimental data and researched estimates. Tmin and Tmax describe the temperature range the equation is valid for.A? ? ? ? 23.844 B? ? ? ? -2864.2 C? ? ? ? -5.0474 D? ? ? ? 3.7448E-11 E? ? ? ? 2.7361E-07 Tmin (K) ? ? ? ? 159.05 Tmax (K) ? ? ? ? 516.25 Tmin (℃) ? ? ? ? -114.10 Tmax (℃) ? ? ? ? 243.10，查看更多
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