Areaction has an equilibrium constant of 7.9×103 at 298 k. at 713 k , the equilibrium constant is 0.77. do you predict that the enthalpy of the reaction is positive or negative? why? positive, because endothermic reactions shift toward products at higher temperatures negative, because exothermic reactions shift toward reactants at higher temperatures negative, because exothermic reactions shift toward products at higher temperatures positive, because endothermic reactions shift toward reactants at higher temperatures