Cambridge IGCSE Chemistry practice

Paper 4 structured question: Solids, liquids and gases

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Paper

Marks

Topic

Solids, liquids and gases

Exam-style question

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Paper 4Theory (Extended)3 marks

Analyze the behavior of particles during phase changes.

Description

A cooling curve shows how the temperature of a substance decreases as it loses heat.

a
Explain what happens to the particles of a gas as it cools and condenses into a liquid.
Your answer
Aim for approximately 3 distinct marking points.
[3]

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Paper 4Theory (Extended)1 marks

Description

Heating and cooling curves illustrate the temperature changes of a substance as it undergoes phase transitions.

a
State the process that occurs when a solid turns into a liquid.
Your answer
Aim for approximately 1 distinct marking point.
[1]