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Energy required to dissociate 4 g of gas...

Energy required to dissociate 4 g of gaseous hydrogen into free gaseous atoms is 208 k cal at `25^@C`. The bond energy of H-H bond will be

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The correct Answer is:
104
`2H_(2) rarr 4H, Delta H = 208 kcal`
`H - H rarr 2H , Delta H = (208)/2 kcal`
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