How is an endergonic reaction defined?

An endergonic reaction is defined as a reaction that requires energy to proceed. In these types of reactions, the change in free energy is positive, meaning the products have higher energy than the reactants. This necessitates the input of energy for the reaction to occur, distinguishing it from exergonic reactions, which release energy during the process. The need for energy input is essential for driving these reactions forward, especially in biological systems where processes like photosynthesis are endergonic, capturing energy from sunlight to convert carbon dioxide and water into glucose. Understanding the definition and characteristics of endergonic reactions is crucial for grasping broader concepts in both biochemistry and sports nutrition, where energy dynamics are fundamental.