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Which observation indicates that a reaction is endothermic?

Answer and explanation

Correct answer: The temperature of the container and its surroundings decreases

An endothermic reaction absorbs heat from its surroundings. Therefore, the temperature of the container and its surroundings may decrease, and the container may feel cold. In contrast, an increase in temperature usually indicates an exothermic reaction. Formation of a precipitate or production of gas may show that a reaction has occurred, but it does not by itself establish that the reaction is endothermic.

Related tags

ScienceClass-10Chemical-ReactionsEndothermic-ReactionTemperature-Change

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