Review Constants Periodic Table Elemental carbon usually exists in one of two forms: graphite or diamond. It is generally believed that diamonds last forever. The table shows the standard enthalpy of formation (AH) and the standard molar entropy (S) values for diamond and graphite. Substance AH: (kJ/mol) S (J/mol K) 0 5.740 Cgraphite Cdiamond 1.897 2.38 Part A What is the standard Gibbs free energy for the transformation of diamond to graphite at 298 K? Cdiamond graphite Express your answer to three significant figures and include the appropriate units. View Available Hint(s) Ti ? AGPxn= Value Units Submit Previous Answers