1.

In gaseous reactions important for-the understanding of the upper atmosphere H_2O and O react bimolecularly to form two OH radicals. DeltaH for this reaction is 72 kJ at 500 K and E_a is 77 kJ mol^-1, then E_b for the bimolecular recombination of two OH radicals to form H_2O and O is::

Answer»

3kj`mol^-1`
4kj `moll^-1`
5kj `moll^-1`
7kj`mol^-1`

ANSWER :C


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