Chemical Reaction On Energy And Carbon

1555 Words Aug 20th, 2015 7 Pages
Preliminary Chemistry-Assessment Task 3
Research – Energy and Carbon
Photosynthesis can be considered the most important chemical reaction on Earth. Most life on Earth is maintained using energy stored in the carbohydrate glucose produced by photosynthesis. Green plants contain chlorophylls, pigments, which have the ability to trap light energy. The trapped light energy is changed into chemical energy, which is stored in carbohydrates such as glucose (C6H12O6). Photosynthesis means building up, synthesis, and using light, photo. The raw materials for this process are carbon dioxide (CO2) gas from the atmosphere, and liquid water (H2O) obtained through the roots of land plants. A by-product of this process is oxygen (O2) gas, which is released to the atmosphere.
Carbon Dioxide + Water Glucose + Oxygen
6CO2 (g) + 6 H2O (l)  C6H12O6 (s) + 6O2 (g)
This is an energy absorbing or endothermic reaction as it absorbs energy from sunlight. About 2800kJ of energy are needed to produce each mole of glucose by this reaction. The water-soluble glucose produced is easily transported to other parts of the plant. Some of the small glucose molecules are joined into long thin water-insoluble cellulose molecules, which are the main structural materials in plant cell walls. Other glucose molecules are joined to form spiralling or branching starch molecules, which are stored in cells as a food source.
First of all, without plants the entire…
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