Search for question
Question

9. Calculate and draw the Gibbs adsorption isotherm using the dependence of interface

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