What is an endothermic reaction?

An endothermic reaction is characterized by its absorption of heat from the surroundings. During this type of reaction, the system takes in thermal energy, which typically results in a decrease in temperature of the immediate environment. This heat absorption is essential for breaking chemical bonds in the reactants or allowing the reaction to proceed. The result is often observable as a drop in temperature or a requirement for heat input for the reaction to occur.

Endothermic reactions are commonly seen in processes like photosynthesis, where plants absorb sunlight to convert carbon dioxide and water into glucose and oxygen, emphasizing the importance of energy intake in chemical transformations.