Interfacial Tension between Water and Organic Liquid lighter than water by Capillary Rise Method

Abstract

Interfacial tension between two liquids water and immiscible organic liquid heavier than water has been determined by capillary rise method. The difficulties encountered in the determination of interfacial tension by capillary rise method and how to overcome the difficulties has been discussed. The interfacial tensions between water and organic liquids, carbon tetrachloride, chloroform, nitrobenzene and o-anisidine which are heavier than water have been determined at room temperature (29±1oC) by capillary rise method using a pyrex glass capillary tube of uniform radius. The values of the interfacial tension determined by the capillary rise method were found to be negative indicating that the interfacial tension was acting in the downward direction. The force in the vertically upward direction was considered as positive. The interfacial tensions determined by capillary rise method were in close agreement with the reported values.