9. What does one mean by exothermic and endothermic reactions? Give examples.
10. Why is respiration considered an exothermic reaction? Explain.
11. Why are decomposition reactions called the opposite of combination reactions?
Write equations for these reactions.
Answers
Answer:
➡️Exothermic Reaction: A chemical reaction in which heat is given out is known as exothermic reaction. For example.
➡️Endothermic Reaction: A chemical reaction in which heat energy is absorbed is known as endothermic reaction.
Carbolydrates present in food are broken down to form glucose. This glucose combines with oxygen in the cells of our body and provides energy. This reaction is known as respiration. hence,respiration is considered as an exothermic reaction...!
Answer:
9.Answer: Exothermic Reaction: A chemical reaction in which heat is given out is known as exothermic reaction. For example. Endothermic Reaction: A chemical reaction in which heat energy is absorbed is known as endothermic reaction.
10.Carbolydrates present in food are broken down to form glucose. This glucose combines with oxygen in the cells of our body and provides energy. This reaction is known as respiration. hence,respiration is considered as an exothermic reaction.
11.Answer: In a combination reaction two or more substances are combined to form new substance while in the decomposition reaction one substance decomposes into two or more substances. Hence, the decomposition reactions are called opposite of combination reactions.