tension at heptane-aqueous solution at 293 K. Calculate the surface activity of this
surfactant (Tween 80). Interfacial tension (at the absence of surfactant) equals to 51,0
mJ/m².
Csurfactant,
mmol/1
G, mJ/m²
5
45,6
10
43,2
15
41.3
20
40,0
25
39,0
30
38,3
35
37,7
Fig: 1