Unit 6 Flashcards

1
Q

What is a chemical change

A

In a chemical change, a new chemical substance is produced

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2
Q

How can you tell that a chemical reaction is taking place

A

One or more new chemical substances are formed. The new substances usually looks different from the starting substances.

Energy is taken in a given out during the reaction

The change is usually difficult to reverse. This means that it will be hard to get back the raw materials of the reaction.

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3
Q

What is a exothermic reaction?

A

A change that gives out heat during a chemical reaction

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4
Q

What is a endothermic reaction?

A

Change that takes in heat energy during a reaction

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