The enthalpy of formation of an element in its standard state is

Name: The enthalpy of formation of an element in its standard state is
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Quizplus · Accepted Answer

The enthalpy of formation of an element in its standard state is defined as the enthalpy change that accompanies the formation of one mole of the substance from its elements in their standard states, and since the element is already in its standard state, no formation is taking place, and therefore the enthalpy of formation is zero.

The Enthalpy of Formation of an Element in Its Standard