H Free Energy Change ·△G=free energy of(products-reactants), amount of energy available to do work. Negative values indicate spontaneity. ·△Go=-RT((InKeg) where R=8.314 J/K-mol and T=temperature in kelvins Since chlorination has a large Keg:the free energy change is large and negative. => Chapter 4 11 Chapter 4 11 Free Energy Change • DG = free energy of (products - reactants), amount of energy available to do work. • Negative values indicate spontaneity. • DGo = -RT(lnKeq) where R = 8.314 J/K-mol and T = temperature in kelvins • Since chlorination has a large Keq, the free energy change is large and negative. =>