The quantity which is not zero for an element in its standard state at `298 K` is

Explain why the enthalpy of formation and the entropy of formation of an element in its standard state at 298 K and 1 bar pressure are not equal ?

Enthalpies of all elements in standard states are-

The enthalpy of formation for all elements in their standard state is

The enthalpies of all elements in their standard state are :

The enthalpies of all elements in their standard states are :