if enthalpy is positive?
<answer> The reaction is endothermic. <context> If δ H is positive, the reaction is endothermic, that is heat is absorbed by the system due to the products of the reaction having a greater enthalpy than the reactants. On the other hand if δ H is negative, the reaction is exothermic, that is the overall decrease in enthalpy is achieved by the generation of heat.