Final answer:
True, a chemical reaction that absorbs more energy than it releases is an endothermic reaction, indicated by a positive enthalpy change and often associated with a cooling effect.
Step-by-step explanation:
The statement is true. A chemical reaction in which more energy is absorbed than is released is indeed an endothermic reaction. In an endothermic reaction, energy is absorbed from the surroundings, often resulting in a cooling effect in the area around the reaction. This energy is used to break bonds in the reactants, and if this process requires more energy than is released when new bonds form in the products, then the reaction is endothermic. An example of an endothermic process is photosynthesis, where plants absorb sunlight to convert carbon dioxide and water into glucose.
An endothermic reaction's enthalpy change (ΔH) is positive, indicating that the products have higher energy than the reactants due to the net absorption of energy. Typical indicators of endothermic processes include temperature drops in the reaction environment, as observed with cold packs that absorb heat when activated.