alleryIonization energy and electron affinity, unlike the matching enthalpies, are defined at:
ARoom temperature, 298 K
BIce point, 273 K
CAbsolute zero, 0 K
DThe boiling point
Answer & Solution
Correct answer: C. Absolute zero, 0 K
These energies are defined at 0 K; at other temperatures heat capacity terms convert them to enthalpies.
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