aylengarcia090
25.10.2019 •
Chemistry
Which is the most important question for deciding if a chemical reaction has occurred? was there a change in the size? was any heat energy given off? what is the density of the substance? what is the texture of the substance?
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Ответ:
Option (b) is the correct answer.
Explanation:
A chemical reaction can be exothermic or endothermic in nature. That is, if there is release of energy during a chemical reaction then the reaction is exothermic.
If there is absorption of energy during a chemical reaction then the reaction is endothermic in nature.
Thus, when we ask was any heat energy given off? Then, we are talking about a chemical reaction which has occurred.
Ответ:
Option (b) is the correct answer.
Explanation:
Ответ: