Question

Is respiration a chemical change? How?

Answer 1

yes it is a chemical change because it is taking in oxygen and utilizing it to release energy as energy is released so it is a chemical change whereas breathing is a physical change as it is just taking in oxygen..

hope it helps

Answer 2

Yes, respiration is a chemical change.

• Oxygen is taken during the respiration,the output should be also the oxygen in order to make it a physical change.

• But,the output is carbon dioxide which is completely different from the oxygen. That's why it is considered as a chemical reaction where the initial compound is oxygen and final compound is carbon dioxide.

• In the respiration process,heat is also generated that's why it is an exothermic chemical reaction