Formation of water from its elements is...

Formation of water from its elements is spontaneous, but is slow. Comment .

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Free energy decreases during the formation of water from its elements. Hence, thermodynamically the rection is spontaneous. Criterion of spontaneous should not be correlated with time. Spontaneous reaction means that it will take place but how long it will take, thermodynamics does not tell. At room temperature, without using a catalyst, about `1%` of the reaction is complete in one year. The rection is slow. It is kinetically non- spontaneous.

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