The thermal pressure coefficients of liqs. for 1-pentanol, 1-hexanol, 1-heptanol, and 1-octanol have been measured over the temperature range of 25~85癈. It is found that their internal pressures don't vary much with temperature The modified van der Waals model is applied to the alcohol liqs. As nonassocg. liqs., their excluded vol. can also be expressed as a linear function of d. However, the ratio of the model parameters, B/A2 is not a constant and decreases speedily with increase of the no. of carbon atoms in the alcohol mol. This ratio may be considered as a measure of the ability of self-assocn. for alcs.

Key words: OCTANOL, PENTANOL, HEPTANOL, HEXANOL, INTRINSIC PRESSURE, ASSOCIATED LIQUID