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Cambridge IGCSE Physics practice

Paper 4 structured question: Specific heat capacity

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6

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Specific heat capacity

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Paper 4Theory (Extended)6 marks

Calculating energy change using specific heat capacity.

Description

Energy Change Calculation

A substance has a specific heat capacity of 4.2 J/kg°C. If 2 kg of this substance is heated, causing a temperature change of 5°C, calculate the energy change.

  1. a

    Define the term specific heat capacity.

    Aim for approximately 2 distinct marking points.

    [2]
  2. b

    State the formula used to calculate energy change.

    Aim for approximately 1 distinct marking point.

    [1]
  3. c

    Identify the energy change when 2 kg of the substance is heated by 5°C.

    Aim for approximately 3 distinct marking points.

    [3]

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Paper 4 structured question: Specific heat capacity

Paper 4Theory (Extended)1 marks

Description

Specific Heat Capacity

Specific heat capacity is defined as the energy required to raise the temperature of one unit mass of a substance by one degree Celsius. The formula used is ∆E = c ∆m θ.

  1. a

    State the definition of specific heat capacity.

    Aim for approximately 1 distinct marking point.

    [1]