C7. Chemical reactions

Question 1

Exothermite

Answer 1

• feels hot

- releases energy from bond making

Question 2

Endothermite

Answer 2

-takes in energy for bond breaking

Question 3

define catalyst

Answer 3

a substance that speeds up a reaction but remains chemically unchanged at the end of the reaction

Question 4

concentration/pressure on rate of reaction

Answer 4

→reactant particles becomes more crowed
→more frequent collision of the particles
→rate of reaction increases

Question 5

temp on rate of reaction

Answer 5

→reactant particles have more kinetic energy
→ move more quickly
→rate of reaction increases

Question 6

SA on rate of reaction

Answer 6

→more particles are exposed to reactant particles
→more frequent collision of the particles
→rate of reaction increases