Question

Why is respiration exothermic process and photosynthesis an endothermic process?​

Answer 1

Answer:-

Respiration:-

• It is a process by which we get energy from the food we eat.
• During this process,the carbohydrates formed during the breaking down of food into simpler substances, is broken down to form glucose.
• The glucose along with the oxygen is provided to the cells of a body so that they can function properly.
• This provides energy to all the cells in our body.
• The waste products like carbon dioxide which is produced by the cells is given out from the body in the process through the action called breathing.
• C6H12O6 + 6 O2 ➜ 6 CO2 + 6 H2O + energy
• Hence, as in this process heat is released, it is called an exothermic process.

Photosynthesis:-

• It is a process of formation of food done by the plants.
• In this process, the light energy is absorbed by the chlorophyll and is converted to a chemical energy.
• The water molecules are split into hydrogen and oxygen and Carbon dioxide is reduced to form carbohydrates.
• The carbohydrate form is used as an energy source by the plants.
• 6 CO2 + 12 H2O ( sunlight + chlorophyll ) ➜ C6H12O6 + 6 H2O + 6 O2
• As in this process energy is absorbed to form carbohydrates, it is called as an endothermic process.

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