Question

Difference between combustion and cellular respiration

Answer 1

RespirationRespiration

1. It is a biological process. It is under biological control.

2. It takes place at normal temperature.

3. Respiration is a slow process. Thus the energy is also liberated in several steps and remain stored in the form of ATP.

4. Several enzymes are involved. The process is bio chemical.

5. Only part of energy is liberated as heat.

6. Oxygen is employed as an oxidant only at the end of the reaction.

Combustion or burning

1. It is a chemical process. It is an uncontrolled process.

2. It takes place at high temperature

3. Combustion is a fast process in which the energy is liberated only in one step resulting in increase in temperature and production of fire.

4. Enzymes are not involved. The process is physio chemical.

5. Most of the energy is produced as heat.

6. Oxygen is directly used in the process.

Answer 2

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