1) Chemical bond property 
Compare with bond enthalpy. Energy change per mole when a bond is broken in the gas phase for a particular substance.
The amount of energy necessary to break one mole of bonds of a given kind (in gas phase). The amount of energy necessary to break one mole of bonds in a substance, dissociating the sustance in the gaseous state into atoms of its elements in the gaseous state.
The amount of energy necessary to break one mole of bonds of a given kind (in gas phase).The amount of energy necessary to break one mole of bonds in a substance, dissociating the sustance in the gaseous state into atoms of its elements in the gaseous state.
The energy needed to break a molecular bond. ... (09 Oct 1997) ... 
Energy change per mole when a mole is broken in the gas phase for a particular substance. See also: Primary Bond, van der Waals Bond.