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Why does this reaction have a dispersal of matter but is not spontaneous?

Considering the Reaction: 2H2O(l) => 2H2(g) + O2 (g)

This reaction has dispersal of matter since a liquid produces two gases, yet the reaction is not spontaneous. Why is this so?

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The definition of a spontaneous reaction is one that occurs automatically, without the use of an enzyme, catalysis, ...

Solution Summary

This solution identifies the requirement for spontaneous reactions and provides an example. 80 words.