Adsorption of n-octanol at the n-dodecane/water interface

Abstract

The adsorption of n-octanol from dilute solutions in n-dodecane to the dodecane/water interface has been studied in the temperature range 15–35°C. Standard free energies of adsorption have been calculated as a function of temperature and a mean standard heat of adsorption for the temperature range has been computed. The Volmer equation represents the data adequately, with a molecular “co-area” of 0.24 (±0.02) nm² molecule^–1. The present results are compared with previously reported data for 20°C.