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    Define the term mean bond enthalpy (2 marks)

    I think i've got it but i was wondering what the 2 points needed for this actually are

    thanks
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    the quantity of energy needed to break a particular bond in a molecule

    adit: you could add it's always an endothermic value?
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    energy needed to break one mole of a covalent bond, from the gaseous element's standard state.
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    (Original post by MC REN)
    Define the term mean bond enthalpy (2 marks)

    I think i've got it but i was wondering what the 2 points needed for this actually are

    thanks
    Here's what I would put.
    The average enthalpy required to break one mole of a particular bond, e.g. C-H
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    you need to distinguish between the energy required to break one mole of specific bonds within a specific compound (this is the bond dissociation enthalpy) and the average energy required to break one mole of specified bonds over a range of compounds (the mean bond enthalpy)

    The two marks are for:

    1 mole of bonds
    specifying that it is an average value taken from a range of compounds
 
 
 

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