<P> All elements in their standard states ( oxygen gas , solid carbon in the form of graphite , etc . ) have a standard enthalpy of formation of zero , as there is no change involved in their formation . </P>
<P> All elements in their standard states ( oxygen gas , solid carbon in the form of graphite , etc . ) have a standard enthalpy of formation of zero , as there is no change involved in their formation . </P>
why is the enthalpy of formation of an element zero
why is the enthalpy of formation of an element zero
there is no change involved in their formation
there is no change involved in their formation