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Cambridge IGCSE Combined Science practice

Paper 4 structured question: Exothermic and endothermic reactions

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Exothermic and endothermic reactions

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Paper 4Theory (Extended)2 marks

Consider the energy changes during a chemical reaction.

Description

Chemical Reaction Energy Changes

When a chemical reaction occurs, bonds are broken and formed, leading to energy changes.

  1. a

    Discuss the implications of energy changes in chemical reactions for practical applications.

    Aim for approximately 2 distinct marking points.

    [2]

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Paper 4 structured question: Exothermic and endothermic reactions

Paper 4Theory (Extended)2 marks

Description

Energy Changes in Reactions

In chemical reactions, bonds are broken and formed, leading to energy changes.

  1. a

    Explain the difference between endothermic and exothermic processes in terms of energy changes.

    Aim for approximately 2 distinct marking points.

    [2]