HCt一H Free Energy Change H ·△G=free energy of(products-reactants)), amount of energy available to do work. Negative values indicate spontaneity. ·△Go=-RT(InKea) where R=1.987 cal/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 = 1.987 cal/K-mol and T = temperature in kelvins • Since chlorination has a large Keq, the free energy change is large and negative. =>