Why is photosynthesis an example of a chemical reaction, and why is it classified as endothermic?
endothermic means energy is absorbed by the reaction
photosynthesis absorbs radiant (light) energy and uses it in the conversion of carbon dioxide and water into oxygen and carbohydrate
energy comes in as light, and chemical reactions take place.
Correct!
Photosynthesis requires energy, making it an endothermic reaction. Light, generally sunlight, is the source of this energy. The process converts the sun’s electromagnetic energy into chemical energy, which is then stored in chemical bonds in the plant. Sunlight is the primary source of energy on the surface of Earth.
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Photosynthesis is an example of a chemical reaction because it involves the transformation of reactants into products through the breaking and forming of chemical bonds. In the case of photosynthesis, the reactants are carbon dioxide and water, and the products are glucose and oxygen. This process occurs in the chloroplasts of plant cells and requires the presence of chlorophyll, a pigment that captures sunlight.
Photosynthesis is classified as an endothermic reaction because it requires energy input in the form of sunlight. Specifically, during photosynthesis, light energy is absorbed by the chlorophyll, initiating a series of reactions that convert carbon dioxide and water into glucose and oxygen. This energy is used to drive the synthesis of glucose, a high-energy molecule that plants use as a source of food and for various cellular processes.
To determine why photosynthesis is classified as endothermic, we can break down the word itself. "Endo" means "within" or "inside," while "thermic" refers to heat or energy. Therefore, an endothermic reaction absorbs energy from its surroundings. In the case of photosynthesis, the energy is obtained from sunlight, which is an external source. Without this energy input, the reaction cannot proceed, and photosynthesis cannot occur.