Chemistry

Adele

23 April, 21:43

Which statement about enthalpy is true?

The enthalpy of formation for a pure element in its standard state is always positive.

The enthalpy of formation for a pure element in its standard state is always negative.

Enthalpy is a state function because its change depends only on initial and final conditions.

Enthalpy is not a state function because its change depends on the identities of the reactants and products.