Photosynthesis is an example of a chemical reaction because: c.) endergonic; light energy is used to build chemical bonds.
An endergonic reaction requires free energy to proceed and example of an endergonic reaction is photosynthesis. Photosynthetic organisms perform the reaction using solar photons to drive the reduction of carbon dioxide to glucose and oxidation of water to oxygen.
Photosynthesis starts with molecules of water and carbon dioxide. When light is added, then molecules break apart to rearrange into new molecules of glucose and oxygen.
Photosynthesis is an endergonic reaction because plants cannot start the photosynthesis until they absorb light energy. Chlorophyll absorbs the light energy, which is used for the photosynthesis reaction to occur.
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