CHEM101 Chapter Notes - Chapter 12: Spontaneous Process, Thermodynamics
15 Mar 2016
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In thermodynamics, this direcion is called the spontaneous direcion. The process can only be reversed by the acion of some outside force. (water can be pumped uphill, for instance. ) Mater becomes dispersed, but the reverse rxn is not spontaneous. The spontaneity of any process must be evaluated in terms of the dispersal of both energy and mater. Entropy and the second law : the measure of the disorderly dispersal of energy or matter is called the entropy, s. S = k lnw k where k = 1. 381 . 10-23 j k-1 and w is the number of microstates, the ways in which the molecules of a system can be arranged while keeping the total energy constant. Any energy transfer results in either dispersal or constraint of energy, and thus generates a change in entropy.
