What is the standard enthalpy of formation for an element in its standard state?
A.
It is undefined because elements cannot have enthalpy of formation.
B.
It is zero because the formation of an element from itself requires no energy change.
C.
It is equal to the bond enthalpy of the element.
D.
It is the same for all elements regardless of their state.
Exam No：AP Chemistry Problem Set 3 Year：2024 Question No：APChemistry2024AP0504
Answer:
B
Knowledge points:
6.8 Enthalpy of Formation
Solution:
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