Endothermic reactions

An endothermic reaction is a process that absorbs energy, usually in the form of heat, from its surroundings. This absorption causes the surroundings to feel cooler because energy is taken in to drive the reaction forward. For example, when ice melts into water, it absorbs heat from the environment. Endothermic reactions are common in various natural and industrial processes, including photosynthesis in plants and certain chemical manufacturing steps. The key idea is that energy input is required for these reactions to occur, and the system gains energy during the process.