Consider the following equilibrium systems. predict the change in the equilibrium constant kc that would occur in each case if the temperature of the reacting system were raised. (a) a equilibrium reaction arrow 2b δh° = 20.0 kj reaction 1: there is no change. k_c decreases. k_c increases. reaction 2: there is no change. k_c increases. k_c decreases. reaction 3: there is no change. k_c increases. k_c decreases.