The interfacial tensions of binary liquid-liquid systems ( n-heptane+water)

( n-hexane+water)

(n-octane+water)

(n-nonane + water)

(n-heptanol water)

(n-hexanol+water)

(n-octanol+water)

(n- nonanol + water) in the temperature range from 298.15 K to 343.15 K at constant pressure were measured by the pendant drop method. The interfacial tensions of aliphatic hydrocarbon - water systems decreased linearly with higher temperature

but those of aliphatic alcohol - water systems increased

then decreased with higher temperature. In addition

the N - A method used for estimating interfacial tensions was discussed further

which is paid a good deal of attentionto and is one of the purposes of this research.