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Pharmaceutical Analysis
book

Pharmaceutical Analysis

by P. D. Chaithanya Sudha
July 2012
Intermediate to advanced content levelIntermediate to advanced
758 pages
17h 12m
English
Pearson India
Content preview from Pharmaceutical Analysis

Chapter 4

Surface Tension Determination

INTRODUCTION

Surface tension is a phenomenon in which the surface of the liquid is in contact with the gas. Surface tension is defined as the force acting at right angles to a line of unit length present in the surface. This is denoted by ‘γ’.

 

W = F × d

 

where W = work; F = force; d = distance.

Therefore,

 

(γ) Gamma = F/d

 

The SI units for the surface tension are newton/meter or dyne/cm.

At a liquid surface, the molecule is not completely surrounded by other molecules.

 

Surface tension phenomenon

 

Surface tension phenomenon

 

The surface tension of a liquid is the energy required to increase the surface area which increases ...

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Publisher Resources

ISBN: 9789332515659