Chemistry Chapter 2 Vocabulary

Question 1

Minimum amount of energy needed to start a chemical reaction.

Answer 1

activation energy

Question 2

Substance that speeds up a chemical reaction but is not used up itself or permanently changed.

Answer 2

catalyst

Question 3

Shorthand form for writing what reactants are used and what products are formed in a chemical reaction; sometimes shows whether energy is produced or absorbed.

Answer 3

chemical equation

Question 4

Process that produces chemical change, resulting in new substances that have properties different from those of the original substances

Answer 4

chemical reaction

Question 5

Describes how much solute is present in a solution compared to the amount of solvent.

Answer 5

concentration

Question 6

Chemical reaction in which heat energy is released.

Answer 6

exothermic reaction

Question 7

Catalysts that are large protein molecules which speed up reactions needed for your cells to work properly.

Answer 7

enzyme

Question 8

Chemical reaction in which heat energy is absorbed.

Answer 8

endothermic reaction

Question 9

Substance that slows down a chemical reaction, making the formation of a certain amount of product take longer.

Answer 9

inhibitor

Question 10

Substance that forms as a result of a chemical reaction.

Answer 10

product

Question 11

Measure of how fast a chemical reaction occurs.

Answer 11

rate of reaction

Question 12

Substance that exists before a chemical reaction begins.

Answer 12

reactant