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QuestionBiology

Is photosynthesis an endergonic or exergonic reaction?
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Step 1:
I'll solve this problem step by step:

Step 2:
: Understanding the Terminology

- Endergonic reactions are chemical reactions that absorb energy from the surrounding environment - Exergonic reactions are chemical reactions that release energy to the surrounding environment

Step 3:
: Analyzing Photosynthesis

6CO_{2} + 6H_{2}O + \text{light energy} \rightarrow C_{6}H_{12}O_{6} + 6O_{2}
Photosynthesis is the process by which plants convert light energy into chemical energy stored in glucose. The overall chemical equation is:

Step 4:
: Energy Requirement

- Photosynthesis requires input of light energy to convert carbon dioxide and water into glucose and oxygen - The reaction does NOT spontaneously occur without energy input - The light energy is used to break chemical bonds and create new, energy-rich molecules

Step 5:
: Determining the Reaction Type

- Since photosynthesis requires energy input to proceed - The reaction is ENDERGONIC - Energy is absorbed during the process to create glucose, which stores more potential energy than the initial reactants

Final Answer

Photosynthesis is an ENDERGONIC reaction because it requires energy input (from sunlight) to produce energy-rich glucose molecules.