9.3 Choosing fuels

Which of the following is a substance that releases more heat when it burns?

• Carbon dioxide.

• Hydrogen.

• Diesel.

• Ethanol.

A substance that releases useful heat when it burns.

• Fuel.

• Salt.

• Substrate.

What type of reaction are burning fuel reactions?

• Neutralization.

• Exothermic.

• Nuclear.

• Endothermic

Which fuel releases the least heat on burning?

• Hydrogen

• Ethanol

• Diesel

• Methane

What is the main combustion product of hydrogen?

• Methane

• Carbon dioxide

• Oxygen

• Water

What are the combustion products of ethanol?

• Carbon dioxide + Water

• Carbon dioxide

• Oxygen

• Water

Which fuel is separated from crude oil?

• Methane

• Ethanol

• Diesel

• Hydrogen

Which fuel is formed from animal waste and rubbish dumps?

• Methane

• Hydrogen

• Ethanol

• Diesel

Which fuel is a non-renewable resource?

• Diesel

• Hydrogen

• Methane

• Ethanol

Which fuel is renewable?

( more than one answer)

• Diesel

• Methane

• Ethanol

• Hydrogen