Chapter 8

Question 1

A chemical change resulting from a collision between atoms or molecules

Answer 1

A chemical reaction

Question 2

The original substances tha under go the reactions are

Answer 2

Reactants

Question 3

The new substance produced by the reaction are the

Answer 3

Products

Question 4

An expression that uses chemical symbols is called an

Answer 4

chemical Equation

Question 5

Arrow means

Answer 5

Yield

Question 6

Indicates how many molecules or founula units of that substance are involved in the substance

Answer 6

efficient

Question 7

The study of the relationship between chemical reactions and the laws of thermodynamics

Answer 7

Chemical thermodynamics

Question 8

A chemical reaction that releases thermal energy is

Answer 8

Exothermic reaction

Question 9

Chemical reactions that cause energy to be observed and stored

Answer 9

Endothermic reaction

Question 10

Able to occur by itself without continuing outside help

Answer 10

Spontaneous

Question 11

The area of chemistry that addresses the rates of chemicals reactions

Answer 11

Chemical kinetics

Question 12

The kinetic energy required for molecules to chemically react is called

Answer 12

Activation energy

Question 13

A substance that alters the rate of a chemicla reaction without being perminantely ccanged

Answer 13

Catalysts