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What is the importance of temperature change in identifying a chemical reaction?

Answer and explanation

Correct answer: It can indicate energy change

A temperature change can provide evidence that energy has been transferred during a chemical reaction. Exothermic reactions release heat and may raise the temperature, whereas endothermic reactions absorb heat and may lower it. Thus, option A is correct. Temperature change is useful evidence but is not, by itself, an absolutely exclusive test, because some physical processes can also involve heat transfer; the other options make incorrect absolute claims.

Related tags

Chemical ReactionsTemperature ChangeEnergy ChangeExothermicEndothermicChemical Reactions And EquationsChemical Substances – Nature And BehaviourChemical Substances Nature And Behaviour

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