Y8: Combustion

• Chemistry
• Lower Secondary (Key Stage 3)

Y8: Combustion

Match the energy stores to the descriptions.

The energy stored in hot objects.

The energy stored in objects that are stretched or compressed.

The energy stored in moving objects.

The energy stored in objects above the ground.

The energy stored in food, fuels and batteries.

Kinetic

Chemical

Thermal

Elastic

Gravitational potential

Sort the fuels into renewable and non-renewable.

Renewable

Non-renewable

Solar

Coal

Nuclear

Biofuel

Wind

Wave

Hydroelectric

Oil

Gas

Petrol

Geothermal

What does non-renewable mean?

Which of these is removed by a fire blanket?

1. Oxygen
2. Heat
3. Fuel

Which of these is removed by a water fire extinguisher?

1. Oxygen
2. Heat
3. Fuel

C+O​2​​→CO​2​​

Is this a combustion reaction?

Mg+O​2​​→MgO

1. Yes
2. No

Is this a combustion reaction?

C+O​2​​→CO​2​​

1. Yes
2. No

Is this a combustion reaction?

CH​4​​+2O​2​​→CO​2​​+2H​2​​O

1. Yes
2. No

Is this a combustion reaction?

HCl+NaOH→NaCl+H​2​​O

1. Yes
2. No

Is this a combustion reaction?

2H​2​​+O​2​​→2H​2​​O

1. Yes
2. No

Is this a combustion reaction?

2K+2HCl→2KCl+H​2​​

1. Yes
2. No

Which of these statements is NOT TRUE about combustion reactions?

1. Oxygen is a reactant
2. An oxide is produced
3. Heat is produced
4. Oxygen is produced

+

Carbon

Oxygen

Carbon dioxide

+

Calcium

Oxygen

Calcium oxide

Complete the combustion equations.

Magnesium   +

+

Water

Water    +

+

Oxygen

Oxygen

Oxygen

Carbon dioxide

Magnesium oxide

Hydrogen

Glucose

Why is this NOT combustion?

HCl+NaOH→NaCl+H​2​​O