The increase of entropy principle does not imply that

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Unformatted text preview: the universe. The increase of entropy principle does not imply that the entropy of a system cannot decrease. The entropy change of a system can be negative during a process (Fig. 7–8), but entropy generation cannot. The increase of entropy principle can be summarized as follows: Sgen (Isolated) 0 Irreversible process 0 Reversible process 0 Impossible process This relation serves as a criterion in determining whether a process is reversible, irreversible, or impossible. Things in nature have a tendency to change until they attain a state of equilibrium. The increase of entropy principle dictates that the entropy of an isolated system will increase until the entropy of the system reaches a maximum value. At that point, the system is said to have reached an equilibrium state since the increase of entropy principle prohibits the system from undergoing any change of state that will result in a decrease in entropy. System Q, W m Surroundings FIGURE 7–7 A system and its surroundings form an isol...
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This document was uploaded on 11/28/2012.

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