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Cambridge IGCSE Physics practice

Paper 3 structured question: Melting, boiling and evaporation

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Melting, boiling and evaporation

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Paper 3Theory (Core)3 marks

Energy changes during phase transitions.

Description

Energy and Phase Changes

Both melting and boiling require energy input. However, the temperature of the substance does not change during these processes.

  1. a

    Explain why the temperature remains constant during melting.

    Aim for approximately 3 distinct marking points.

    [3]

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Paper 3 structured question: Melting, boiling and evaporation

Paper 3Theory (Core)1 marks

Description

Phase Changes

When a solid is heated, it eventually melts into a liquid. Similarly, when a liquid is heated, it boils into a gas. During these processes, the temperature remains constant despite the addition of heat energy.

  1. a

    State the process that occurs when a solid turns into a liquid.

    Aim for approximately 1 distinct marking point.

    [1]