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Question

Bond energies of some bonds are given below:
Cl-Cl = 242.8 kJ mol1, H-Cl = 431.8 kJ mol1,
O-H = 464 kJ mol1, O=O = 442 kJ mol1
Using the B.E.s given, calculate ΔH for the given reaction: 2Cl2+2H2O4HCl+O2

A
906 kJ mol1
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B
172.4 kJ mol1
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C
198.8 kJ mol1
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D
442 kJ mol1
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