Give criteria in terms of temperature changes for exothermic and endothermic reactions

The correct answer based on the criterion of whether the temperature increases or decreases.

Explanation:

If the ambient temperature increases when a reaction takes place, we can deduce that it is an exothermic reaction, since in this type of reaction the system gives heat to the environment, increasing the temperature.

On the other hand, if the ambient temperature decreases, we can deduce that we are in front of an endothermic reaction, since in this type of reaction the system absorbs heat from the environment so the temperature decreases.

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petroleum? coal maybe?

i just calculated it all out, and not including weekends, and all the different days off. as of this school year (2018-2019) students are spending 2198 hours in school this year