Chemistry / Unit 11 Chem 2084 short lesson, about 20 seconds
Entropy Rises with Mixing
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The idea
Entropy also rises when substances mix, since a mixture allows far more particle arrangements than the same substances kept apart.
In practice
Salt water has higher entropy than pure water and dry salt stored separately, even though no reaction occurs.
Where people slip
Mixing raises entropy with no reaction and no visible disorder change, so "nothing happened" is not evidence entropy stayed the same.
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