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    When predicting enthalpies of formation of theoretical compounds It is talked about on page 264 and 265 on the aqa textbook but i don't really understand the reasoning behind it.
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    (Original post by Reiner)
    When predicting enthalpies of formation of theoretical compounds It is talked about on page 264 and 265 on the aqa textbook but i don't really understand the reasoning behind it.
    You can use a Born-Haber cycle to predict the formation enthalpy of hypothetical compounds. If the result is less exothermic then the hypothetical compound is likely to be less stable.
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    (Original post by charco)
    You can use a Born-Haber cycle to predict the formation enthalpy of hypothetical compounds. If the result is less exothermic then the hypothetical compound is likely to be less stable.
    why does it being less exothermic make it less stable and does this apply to all examples?
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    (Original post by Reiner)
    why does it being less exothermic make it less stable and does this apply to all examples?
    The more exothermic a process is the more likely it is. This is fundamentally the 2nd law of thermodynamics.

    An exothermic process releases energy to the surroundings increasing the entropy of the surroundings and hence of the universe.
 
 
 
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