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The bond energy of an O- H bond is 109 kcal mol 1. When a mole of water is formed from H and O atoms, then (a) 218 kcal is released. (b) 109 kcal is released. (c) 218 kcal is absorbed. (d) 109 kcal is absorbed. choose and explain

The bond energy of an O- H bond is 109 kcal mol 1. When a mole of water is formed from H and O atoms, then


 (a) 218 kcal is released.


(b) 109 kcal is released.


 (c) 218 kcal is absorbed.


 (d) 109 kcal is absorbed.


choose and explain

Grade:12

3 Answers

Roshan Mohanty
64 Points
8 years ago

It wil be A
two O-H bonds are there is H2O so 2*109 kcal
and energy is released in bond making 

Vikas TU
14149 Points
8 years ago

218 kcal is released.

when forming 1mol of O-H bond 109kcal is released. Water has two O-H bonds. therefore (109 x 2)kcal is released.

 

 

Plz approve!

Rishi Sharma
askIITians Faculty 646 Points
one year ago
Dear Student,
Please find below the solution to your problem.

It will release 218 kcal.
Two O-H bonds are there is H2O so 2*109 kcal and energy is released in bond making.

Thanks and Regards

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