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In gaseous reactions important for-the u...

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::

A

3kj`mol^-1`

B

4kj `moll^-1`

C

5kj `moll^-1`

D

7kj`mol^-1`

Text Solution

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The correct Answer is:
C
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