Question

How is photosynthesis considered an endothermic reaction?

Answer 1

Unlike many other endothermic reactions, photosynthesis does not absorb energy as heat. Instead, during plants absorb energy from sunlight to turn carbon dioxide and water into oxygen and glucose, which is a type of sugar molecule. The energy is stored in the glucose molecules, ready to be used when needed.

Answer 2

Photosynthesis is an endothermic reaction because sunlight is being absorbed during the reaction and the definition suggests that in a reaction if heat is being absorbed it is termed as an endothermic reaction.