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    What happen if a second electron affinity of a negative ion is positive .
    Do you still ignore the direction of the arrow or flap it around in calculation ?
    thanks for helping
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    (Original post by co2mymail)
    What happen if a second electron affinity of a negative ion is positive .
    Do you still ignore the direction of the arrow or flap it around in calculation ?
    thanks for helping
    You would techinically draw the arrow the other way around - the endothermic direction.
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    Flap it around with the best of them, if I were you.
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    The electron affinity (EA) for any gaseous atom is exothermic and therefore always negative. You should know that the y-axis for the Born-Haber Cycle is, in fact, enthalpy (kJ/mol). This implies that the direction of arrow should always be pointing downwards as the reactants have higher enthalpy than the products and there is a release in energy per mol.

    However, a positive value for EA would imply that the direction of the reaction is reversed already.

    I wish you the best with your studies.
 
 
 
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