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Q.

There is formation of H2O2 in the upper atmosphere H2O+O→2OH→H2O2ΔH=72 kJ mol−1 Ea=77 kJ mol−1Ea for the bimolecular recombination of two OH radicals to form H2O and O is :

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a

149 kJ mol−1

b

−149 kJ mol−1

c

5 kJ mol−1

d

−5 kJ mol−1

answer is C.

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Detailed Solution

X(H2O2→H2O+O)=77−72=5 kJ.
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