1.4- hess's law and bond enthalpies Flashcards
1
Q
what is the mean bond enthalpy
A
the average enthalpy change when 1 mole of covalent bonds ins broken and averaged over a range of compounds
2
Q
why are mean bond enthalpies not exact
A
they are an average of energies needed to break then bond over a range of compounds
3
Q
why is the bond enthalpy in a data book different from the mean bond enthalpy in a specific molecule
A
The mean bond enthalpy in the data book is the average for a bigger range of molecules than just the specific molecule
