Simple Statistical Treatment of Liquids and Gases

We could keep track of all those possibilities because there is an implicit order in the orientation of the egg wells and we have placed numbers on the chips to identify each one. 

W = — =l so that 5 = /fln(l) = 0 and as far as the white poker chips are concerned they are perfectly ordered, so the entropy of this model is zero. 

FIGURE S.S Twelve numbered white poker chips in a one dozen egg carton. 

FIGURE 5.6 Twelve indistinguishable white chips in 12 egg wells are perfectly ordered. 

The concept of indistinguishability is important in molecular science because in many cases there is no way to tell one H atom from another as well as many other indistinguishable cases. 

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