mol enthalpy

What Is The Standard Enthalpy Of Formation Of Fe? Cations ΔHf (kJ/mol) ΔHf (kJ/mol) Fe3+ (aq)-47.7 -691.1 H+ (aq) 0.0 -1302.5 K+ (aq) -251.2 -1298.7 Li+ (aq) -278.5 -55.9 Which substance has a standard enthalpy of formation of zero Fe L? All elements in their standard states (oxygen gas, solid carbon in the form of