Advertisement

How does the surface tension of water change with impurities?


Adding impurities that are slightly soluble, decreases the surface tension of water. For e.g., addition of soap, camphor etc. decreases the surface tension of water.

The surface tension of the water increases if the impurities are highly soluble. e.g. addition of sugar, common salt etc., increases the surface tension of water. 
134 Views

Advertisement
Given, n identical drops (each of radius r) of liquid of surface tension T and density ρ coalesce to form single drop. The energy released in the processes is converted into heat. Find the increase in the temperature of drop.

Explain that spraying results coldness.

n identical drops (each of radius r) of liquid of surface tension T and density ρ coalesce to form single drop. The energy released in the process is converted into kinetic energy. Find the speed of drop.

It is possible to produce a fairly vertical film of soap solution but not of pure water. Explain. 

First 34 35 36 Last
Advertisement