Reactions

Question 1

What is an exothermic reaction?

Answer 1

A reaction in which energy is released into the surroundings.

Question 2

What is an endothermic reaction?

Answer 2

A reaction in which energy is taken in from the surroundings.

Question 3

What is a system?

Answer 3

All the reactants involved in a reaction.

Question 4

What are the surroundings?

Answer 4

Everything outside of the reaction.

Question 5

What are examples of exothermic reactions?

Answer 5

. Combustions reactions (fire)
. Oxidation reactions (adding oxygen)
. Neutralisation

Question 6

What are every day uses of exothermic reactions?

Answer 6

. Handwarmers
. Self heating cans

Question 7

What are examples of endothermic reactions?

Answer 7

. Thermal decomposition
. Citric acid + sodium hydrogen carbonate

Question 8

What are every day uses of endothermic reactions?

Answer 8

Sports injury packs

Question 9

What is activation energy?

Answer 9

Minimum amount of energy required to break the bonds, so a reaction can take place.