i. Among single bonds, which bond is the strongest? ii. How is bond enthalpy related to bond strength?

Monjur Alahi

Study the following tables showing bond enthalpies of single and multiple bonds.

Bond ΔaH/kJ mol-1
C-H 400-415
N-H 390
O-H 460-464
C-C 345
C-N 290-315
C-O 355-380
C-Cl 330
Bond ΔaH/kJ mol-1
C-Br 275
O-O 175-184
C=C 610-630
C≡C 835
C=O 724-757
C≡N 854

i. Among single bonds, which bond is the strongest? 

ii. How is bond enthalpy related to bond strength?


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Salim Ahmed Kawsar

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i. Among single bonds, O-H bond is the strongest.

ii. Larger the bond enthalpy, stronger is the bond.

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