8.3 Bond Enthalpy
Bond Enthalpy (a.k.a. Bond Energy)
Bond breaking is endothermic.
Bond making is exothermic.
ΔH°rxn = ∑Dreactants - ∑Dproducts = ∑Dbroken - ∑Dformed
N2H4(g) + O2(g) → N2(g) + 2H2O(g) ΔH = ?
| Bond Enthalpies (kJ/mol) | |
|---|---|
| N–H | 391 |
| O–H | 463 |
| O=O | 495 |
| N–N | 163 |
| N≡N | 941 |