13. A mixture of hydrogen and chlorine remains unreacted until it is exposed to ultraviolet light from aburning magnesium strip. Then the following reaction occurs very rapidly:  

→

∆G = -45.54 kJ； ∆H = -44.12 kJ； ∆S = -4.76 J/K  Which of the following is consistent with this information?
(A) The reactants are thermodynamically more stable than the products.
(B) The reaction has a small equilibrium constant.
(C) The ultraviolet light raises the temperature of the system and makes the reaction more favorable.
(D) The negative value for ∆S slows down the reaction.
(E) The reaction is spontaneous, but the reactants are kinetically stable.