alleryStart learning →What is true of the sum of enthalpy changes around a Born-Haber cycle?
AIt equals the lattice enthalpy
BIt equals the ionisation step
CIt is always positive
DIt sums to zero overall
Answer & Solution
Correct answer: D. It sums to zero overall
A cycle returns to its starting state, so by Hess's law the enthalpy changes around it sum to zero.
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