A) 109 kcals is released
B) 218 kcals is absorbed
C) 109 kcals is absorbed
D) 218 kcals is released
Correct Answer: D
Solution :
Bond energy of\[OH\]bond = 109 kcal/mol \[\therefore \]energy absorbed in the dissociation of 1 mol of water \[({{H}_{2}}O)=2\times 109=218\text{ }kcal\] \[\therefore \]Energy released in the formation of 1 mol of water = 218 kcal.
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