Chapter 1: Combustion

Question 1

What is a fuel?

Answer 1

A substance that’s stored energy

Question 2

What is combustion?

Answer 2

Another name for burning, an exothermjc reaction (releasing energy into the surroundings)

Question 3

What are the 3 components of the fire triangle

Answer 3

Heat, oxygen and fuel

Question 4

What is the chemical reaction for a hydrogen fuel cell?

Answer 4

Hydrogen+oxygen -> water

Question 5

How is acid rain formed?

Answer 5

Sulphur oxide is carried up with water vapour and dissolved into the rain water and falls as acid rain

Question 6

What are the main causes of acid rain?

Answer 6

Cars, factories, volcanoes

Question 7

What is the test for hydrogen?

Answer 7

A squeaky pop

Question 8

What’s the test for CO2?

Answer 8

Limewater turns cloudy if present

Question 9

Test for oxygen?

Answer 9

A growing splint relights

Question 10

How does complete combustion happen?

Answer 10

Hydrogen atoms combine with oxygen to make water vapour, then the carbon atoms combine with oxygen to make carbon dioxide. The maximum amount of energy is released

Question 11

What is mostly natural gas and what’s the reaction for this?

Answer 11

Methane,

Methane+oxygen-> carbon dioxide+ water