What can a change in temperature during a chemical reaction indicate?
Answer and explanation
Correct answer: Energy change
A rise or fall in temperature indicates an energy change in the reaction. In an exothermic reaction, heat is released, so the temperature may rise; in an endothermic reaction, heat is absorbed, so the temperature may fall. A colour change can also be evidence of a chemical reaction, but a temperature change specifically indicates the release or absorption of heat, that is, an energy change.
Frequently asked questions
What is the correct answer to this question?
Energy change
Why is this the correct answer?
A rise or fall in temperature indicates an energy change in the reaction. In an exothermic reaction, heat is released, so the temperature may rise; in an endothermic reaction, heat is absorbed, so the temperature may fall. A colour change can also be evidence of a chemical reaction, but a temperature change specifically indicates the release or absorption of heat, that is, an energy change.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Chemical Reactions and Equations.
