Year 9 Science · Unit 2 · Lesson 14

Combustion of Hydrocarbons

Foundation Worksheet

Name
Date
Class

Learning Goals

Warm Up

True or False? Fix the false ones

Circle T or F for each statement. If the statement is false, rewrite it correctly on the line below.

Complete combustion of methane produces carbon dioxide and water.

Correct it:

T
F

Incomplete combustion produces the same products as complete combustion, just less of them.

Correct it:

T
F

Carbon monoxide (CO) is toxic because it is a greenhouse gas.

Correct it:

T
F

A blue flame indicates complete combustion.

Correct it:

T
F

Combustion is an endothermic reaction.

Correct it:

T
F

Your Turn

Fill the gap

Choose the correct word from the word bank to complete the passage.

complete oxygen carbon dioxide water incomplete monoxide exothermic ionic sublimation

Combustion is the reaction of a hydrocarbon with to release energy as heat and light. When plenty of oxygen is available, combustion occurs, producing only and as products, shown by a blue flame. When the oxygen supply is limited, combustion occurs instead. In this case, carbon (CO) and soot may also form, and the flame appears yellow or orange. Because combustion releases energy to the surroundings, it is classified as an reaction.

Show What You Know

1. Write the word equation for the complete combustion of methane. Include the state symbols (g) for all reactants and products.

Recall 2 marks

2. Name two products of incomplete combustion that are NOT produced during complete combustion, and explain the health risk associated with one of them.

Recall 2 marks

Wrap Up

In one sentence, what was the main idea of this lesson?

HSCScience · Year 9 Science · Unit 2 · Lesson 14 · Foundation Worksheet