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Q.

Energy required to dissociate 4 gms of H2 (g) , into free atoms is 208 K. cals at 25°C . The H-H bond energy will be

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a

104 K.cals

b

1040 K.cals

c

10.4 K.cals

d

208 K.cals

answer is A.

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Detailed Solution

4g ® 2 moleof H2 required = 208 k.Cal

One mole of H - H required = 104 k.Cal.

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