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Cambridge IGCSE Combined Science practice

Paper 6 structured question: Exothermic and endothermic reactions

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Attempt questionExothermic and endothermic reactions revisionRevise the key idea

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Topic

Exothermic and endothermic reactions

Exam-style question

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Paper 6Alternative to PracticalPractical2 marks

Analyzing data from a reaction energy change experiment.

Results Table

Energy Changes in Reactions

The table below shows the energy changes for various reactions.

ReactionEnergy Change (kJ/mol)
Reaction A-150
Reaction B+50
Reaction C-200
Reaction D+100
  1. a

    Explain Based on the table, identify which reactions are exothermic and which are endothermic.

    Aim for approximately 2 distinct marking points.

    [2]

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Paper 6 structured question: Exothermic and endothermic reactions

Paper 6Alternative to PracticalPractical1 marks

Method

Investigating Exothermic and Endothermic Reactions

You are required to design an experiment to investigate the energy changes in exothermic and endothermic reactions. Identify the variables involved in your experiment.

  1. a

    State Identify the independent variable in your experiment.

    Aim for approximately 1 distinct marking point.

    [1]