Abstract
A group-contribution model, in part based on the UNIFAC method for vapor-liquid equilibria, is developed for predicting pure-component vapor pressures. The model is applied to different hydrocarbons, alcohols, ketones, organic acids, and chloroalkanes of molecular weights below 500. Good representation is obtained for vapor pressure data in the region 10-2000 mmHg. The model may be used to estimate vapor pressures within the above category of compounds for which no experimental data are available. 12 refs.
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