As a chemical reaction occurs, the thermometer in the container records an increase in temperature. What is true of the reaction?

The reaction is endothermic because heat was taken in by the reaction.

The reaction is exothermic because heat was released by the reaction.

The reaction is endothermic because heat was released by the reaction.

The reaction is exothermic because heat was taken in by the reaction.

Question

As a chemical reaction occurs, the thermometer in the container records an increase in temperature. What is true of the reaction?

The reaction is endothermic because heat was taken in by the reaction.

The reaction is exothermic because heat was released by the reaction.

The reaction is endothermic because heat was released by the reaction.

The reaction is exothermic because heat was taken in by the reaction.

anonymous · Answer

I would think if the thermometer is reading an increase in the temperature, then that would be an increase in the surroundings of the reaction molecules. Therefore, the reaction is giving off energy as heat. So exothermic, not endothermic.

joannablackwelder · Answer

The reaction is exothermic because heat was released by the reaction.