2.4 Developing Fuels

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2.4 Developing Fuels
Bond Enthalpy ­ the energy needed to break one mole of a bond to give separate atoms all in the
gaseous state. The units are kJ mol1.
The shorter bonds are
stronger than longer bonds.
Triple bonds are shorter
than double bonds which are
shorter than single bonds.
Double bonds have
higher bond enthalpies than
single bonds but have lower bond
enthalpies than triple bonds.
Average bond enthalpy ­ the average quantity of energy needed to break a particular bond.

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