U2L6 Chemical Reactions

Question 1

what is activation energy?

Answer 1

the minimum amount of energy the reactants need for a chemical reaction to occur

Question 2

what is a chemical reaction?

Answer 2

the process in which the chemical arrangement of a substance than is released into the environment

Question 3

what is an endothermic reaction?

Answer 3

occurs when more energy is absorbed by the substance than is released into the environment

Question 4

what is an exothermic reaction?

Answer 4

occurs when more energy is released by the substance than is substance than is absorbed by the substance

Question 5

what is a product?

Answer 5

a substance that forms during a chemical reaction

Question 6

what is a reactant?

Answer 6

a substance that enters a chemical equation

Question 7

when does an exothermic reaction occur?

Answer 7

if the energy required to break the bonds is greater than the energy required to form new bonds

Question 8

what is an example of an exothermic reaction?

Answer 8

cellular respiration

Question 9

when does an endothermic reaction occur?

Answer 9

when more energy is absorbed by the substance than is released into the environment

Question 10

what is activation energy?

Answer 10

the minimum amount of energy the reactants need for a chemical reaction to occur.