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bond enthhalpy and bond length are inversely related to each other but both these bond parameters increase with increase in no. of hybrid orbitals. how it is possible

bond enthhalpy and bond length are inversely related to each other but both these bond parameters increase with increase in no. of hybrid orbitals. how it is possible

Grade:11

1 Answers

Neeti
571 Points
8 years ago
Bond energy is the energy released when a bond is formed or the energy needed to break a bond ( a measure of strength of the bond) and bond length gives length of the bond, now we know that stronger the bond, closer the atoms are, ( lesser the bond lenght) so greater the bond enthalpy.
 
when you increase the number of hybrid orbitals, i.e. you go from sp to sp2 to sp3 , the bond length definitely increases and according to the data i have, the bond energy decreases with hybridisation.
For example:
 
in ethane, hybridisatrion of carbon = sp3, bond length  1.54 A and bond energy 377 kj/mol
ethene, hyb : sp2 , bond length : 1.33 A , bond energy 720 kj/mol
ethyne, hyb: sp, bond length : 1.20 A , bond energy 967 kj/mol
 
Feel free to ask any follow up question and please approve the answer if you think it’s useful :) (option given just below the answer) 

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