2018 Year 9 Chapter 3 Reaction Types

Question 1

What is the difference between an exothermic and an endothermic reaction?

Answer 1

Exothermic reactions release energy. Endothermic reactions absorb energy.

Question 2

What is the general reaction for an acid+metal?

Answer 2

Salt+hydrogen gas

Question 3

What is the general reaction for acid+base?

Answer 3

Salt+water

Question 4

What is the general reaction for acid+carbonate?

Answer 4

Salt+water+carbon dioxide

Question 5

What is the general reaction for combustion?

Answer 5

Methane/ethane+oxygen gas—>carbon dioxide+water

Question 6

What is the general reaction for corrosion?

Answer 6

Metal+water/air—> non-metal compound