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Construct a Born-Haber cycle and use it ...

Construct a Born-Haber cycle and use it to calculate the first electron affinity of chlorine.
`DeltaH_(atom(CI))= +122 kJ mol^(-1) " " DeltaH_(atom(Mg))=+148 kJ mol^(-1)`
`DeltaH_("1st ionisation energy" (Mg))=+738 KJ mol^(-1) " " DeltaH_(2nd " ionisation cnergy"(MgCI_(2))= +1451 kJ mol^(-1)`
`DeltaH _("lattice energy "(MgCI_(2))= -2526 kJ mol^(-1) " " DeltaH_(2nd " formation "(MgCI_(2)) =-641 kJ mol^(-1)`

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-348 kJ/mol
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