The Complete Interaction Curve

The two stabihzation mechanisms discussed above—electrostatic and steric— represent the extremes of the range of practical techniques that allow us to prepare colloidal systems that are at least kinetically stable. The two mechanisms, however, are not mutually exclusive. In fact, most natural and many technologically important colloids involve a combination of both effects (plus possibly others, yet to be fully determined). A total potential-energy curve, then, might contain a number of terms 

Obviously, knowing how colloids can be stabilized provides an invaluable tool for the preparation of many useful systems. It also can provide clues to how an unwanted colloid can be destabilized and removed. The above-mentioned ideas, at times in a slightly different guise, will appear again in the following chapters on emulsions, foams, aerosols, and similar compounds. 

The total surface of the cubes in Problem 10.20 will be how many times greater than the original  

A particle of gold (density = 19.3 g cm ) has a radius of 1 nm. What is the weight of the particle About how many atoms of gold make up the particle  

Calculate the reversible, thermodynamic energy input required to transform 1 kg of glass (cr = 245 mJ m ) into particles of 1 mm diameter. Assume that the particles are all equivalent in size and surface properties. 

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