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:The claim that the Second Law would not hold over infinite time periods is not [[falsifiable]], and hence not science.--[[User:Aschlafly|Andy Schlafly]] ([[User talk:Aschlafly|talk]]) 12:03, 27 September 2016 (EDT)
Entropy can be defined as:
<math>S = K \ln{\Omega}</math>
Where <math>\Omega</math> is the number of microstates that corresponds to a particular macrostate.
Suppose the gases are completely mixed, so the system has maximum entropy as it is in the macrostate with the greatest number of microstates. It is possible is it not that the gases could separate. This will have fewer microstates and so a lower entropy. Although this is unlikely, it is possible. Hence entropy can decrease in a closed system.
Also I'm talking about finite time periods, not infinite. [[User:Richardm|Richardm]] ([[User talk:Richardm|talk]]) 12:49, 27 September 2016 (EDT)
