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    cejiofor's Avatar
    cejiofor Posts: 1, Reputation: 1
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    #1

    Feb 14, 2011, 10:30 PM
    Calculate overall energy changes in kilojoules per mole for MgF(s) and for MgF2(s).
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    Feb 15, 2011, 10:08 AM

    This type of question usually comes with a lot more information, including the first ionisation energy of Mg, the atomisation energy, the electron affinity etc. Draw your Born-Haber cycle and put your values. Then calculate the net enthalpy change of each compound formed.
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