Recall the definition of enthalpy
Which statement about enthalpy is true?
a. The enthalpy of formation for a pure element in its standard state is always positive
b. The enthalpy of formation of formation for a pure element in its standard state is always negative.
c. Enthalpy is a state function because its change depends only on initial and final conditions
d. Enthalpy is not a state function because its change depends on the identities of the reactants and products
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