In terms of energy, the general chemical equation AB+CD+energy = AD+CB represents a (an)_________ reaction.

endothermic

To determine the type of reaction represented by the given chemical equation, we should analyze the changes in energy and the rearrangement of chemical entities. In this equation, AB and CD are reactants, while AD and CB are products. The presence of energy on the reactant side indicates that energy is being absorbed or added to the system during the reaction. This suggests that the reaction is an endothermic reaction.

An endothermic reaction is a type of chemical reaction that requires or absorbs energy from the surroundings in order to proceed. Thus, the general chemical equation AB + CD + energy = AD + CB represents an endothermic reaction.