Page 38 - Color Atlas of Biochemistry

Physical Chemistry 29

A. Solubility of methane B. The “oil drop effect”
0
-T · ∆S =
+39.6 kJ · mol -1
Oil

Energy 10 x 1 mL 2
Total surface
area: 48 cm

Methane 0 0
∆G =
+26.4 kJ · mol -1
0
∆H =
-13.2 kJ · mol -1 ∆S > 0
Spontaneus -T · ∆S < 0
separation

∆G < 0

1 x 10 mL
Clathrate Surface area:
structure 22 cm 2

C. Arrangements of amphipathic substances in water

Air
Surface film

Water Air

Micelle Soap bubble

Vesicle

Clathrate
structure Air
Double membrane

4 – 5 nm

Koolman, Color Atlas of Biochemistry, 2nd edition © 2005 Thieme
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