1.

If the bond energies of \[H-H\], \[Br-Br\] and \[HBr\] are 433, 192 and 364 \[kJ\,mo{{l}^{-1}}\] respectively, the \[\Delta {{H}^{o}}\] for the reaction, \[{{H}_{2}}(g)+B{{r}_{2}}(g)\to 2HBr(g)\] is [CBSE PMT 2004]

A.      + 261 kJ
B.      ? 103 kJ
C.      ? 261 kJ
D.      + 103 kJ
Answer» C.      ? 261 kJ


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