Chapter 7

Question 1

Reactants

Answer 1

A substance that undergoes a change in a chemical reaction.

Question 2

Products

Answer 2

New substances formed as a result of a chemical reaction.

Question 3

Chemical Equation

Answer 3

A representation of a chemical reaction in which the reactants and products are expressed as formulas.

Question 4

Coefficients

Answer 4

Numbers that appear before a formula in a chemical equation to show the relative proportions of each reactant and product.

Question 5

Chemical Energy

Answer 5

The energy stored in chemical bonds.

Question 6

Exothermic Reaction

Answer 6

A chemical reaction that releases energy to its surroundings.

Question 7

Endothermic Reaction

Answer 7

A chemical reaction that absorbs energy from its surroundings.

Question 8

Reaction Rate

Answer 8

The rate at which reactants change into products over time.

Question 9

Catalyst

Answer 9

A substance that affects the rate of a chemical reaction without being used up in the reaction.

Question 10

Equilibrium

Answer 10

A state in which the forward and reverse paths of a physical or chemical change take place at the same rate.

Question 11

Reversible Reaction

Answer 11

A chemical reaction in which the conversion of reactants into products and the conversion of products into reactants happens at the same rate.