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InterviewSolution
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For stretched rubber, Entropy(1) Increases(2) First increases then decreases(3) Decreases(4) First decreases then increases |
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Answer» If the chain were totally stretched out, it would only have one possible conformation. By coiling itself, it increases the number of conformations it can have, and therefore, its entropy. A more rigorous treatment can be found if you read up about theideal chain, which serves as a model for such systems. Thus, assuming that no other energy exchanges takes place, the tendency of the elastic band to shrink back to its original conformation is due to something called an entropic force, i.e a tendency of the system to move to a configuration that maximises entropy. |
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