Which is stronger? Pi bond and sigma bond .

Nov 2019
2
0
America
It is well known that sigma bond is stronger than Pi bond. However in bond energy table that C=O is 745 KJ and C-O is 358 KJ. we can calculate the Pi bond energy is 745-358=387! The Pi bond(387KJ) is stronger than sigma bond(358KJ) ? How could this happen?
 
Dec 2019
1
1
India
The energy you are talking about in case of π bond is not just the energy to break a π bond. In actuality you have to break both π and sigma bond for a double bond to break so the energy is the sum of energies required to break both sigma and π bond
 
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