A drop of olive oil of radius 0.25mm spreads into a circular film of radius 10 cm on the water surface.Assuming the film to be of molecular thickness estimate the size of the molecule.

Asked by Thomas Albin | 12th Feb, 2012, 06:53: PM

Expert Answer:

Let us suppose that olive oil spreads as a film which is one molecule thick on the water surface. then the thickness of the film would give an estimate of diameter of the molecule.
 
d= volume of the oil drop/ area of the film
 
= 4/3 *pi* (0.025cm)^3/(pi* (10 cm)^2
 
= 2.08X10^-7 cm

Answered by  | 12th Feb, 2012, 07:21: PM

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