Fuels - Unit 3

Question 1

What is complete combustion ?

Answer 1

burning a substance in a plentiful supply of oxygen to produce carbon dioxide

Question 2

What are two examples of combustion?

Answer 2

• Alchohol + Oxygen = carbon dioxide + water
• Hydrocarbon + Oxygen = Carbon dioxide + water

Question 3

What is the complete balanced equation of the combustion of butanol

Answer 3

C4H9OH + 6O2 = 4CO2 + 5H2O

Question 4

What is incomplete combustion?

Answer 4

Burning a substance in a limited substance to produce soot and carbon monoxide

Question 5

What is the equation to find the energy released when fuels burn?

Answer 5

Eh = Energy gained by the solution in kJ
c = Specific heat capacity in kJ kg-1 oC
-1
m = Mass of solution being heated (1 litre = 1 kg)
∆T = Change in temperature of solution (oC)

Eh = cm∆T