• Cl2(g) + H2(g) D 2HCl(g) • K = 2.6 x 1033 and DH = -44kcal at 25oC • Is the rxn endo or exothermic? • Are the reactants or products favored at equil? • What happens when: • increase pressure • inc conc of HCl • inc conc of Cl2 • dec conc of H2 • add a catalyst.