2-4 Energy and Rates of Chemical Reactions

Question 1

a chemical reaction in which heat is released to surroundings

Answer 1

exothermic reaction

Question 2

a chemical reaction that requires heat

Answer 2

endothermic reaction

Question 3

the law that states that energy can not be created or destroyed but can be changed from one form to another

Answer 3

law of conservation of energy

Question 4

the minimum amount of energy required to start a chemical reaction

Answer 4

activation energy