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If a container becomes very cold during a reaction, what is the most suitable explanation of the energy change?

Answer and explanation

Correct answer: The reaction is taking heat from the surroundings

If the container and its surroundings feel colder during a reaction, the reacting system is absorbing thermal energy from the surroundings. Such a heat-absorbing reaction is called endothermic. Therefore option A is the best explanation. A reaction that releases heat would warm the surroundings, while colour change alone does not describe the energy transfer.

Related tags

ScienceClass10Endothermic ReactionEnergy ChangeChemical ReactionsChemical Reactions And EquationsChemical Substances – Nature And BehaviourChemical Substances Nature And Behaviour

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