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If a reaction container feels cold to the touch during a chemical reaction, what is the most appropriate conclusion?

Answer and explanation

Correct answer: Heat has been absorbed

If the outside of a reaction container feels cold, the reaction mixture is taking energy from the surroundings faster than it releases energy to them. This indicates an endothermic reaction, in which heat is absorbed. Therefore option B is the best conclusion. A released-heat process is exothermic and would generally warm the container; coldness alone cannot prove combustion or rusting.

Related tags

Endothermic ReactionHeat AbsorptionChemical ReactionsEnergy ChangeChemical Reactions And EquationsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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