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Cambridge IGCSE Combined Science practice

Paper 3 structured question: Exothermic and endothermic reactions

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Exothermic and endothermic reactions

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Paper 3Theory (Core)2 marks

Endothermic reactions are important in various chemical processes.

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Endothermic Reaction Example

Consider the reaction of ammonium nitrate dissolving in water, which absorbs heat from the surroundings.

  1. a

    Explain the effect of an endothermic reaction on the temperature of the surroundings.

    Aim for approximately 2 distinct marking points.

    [2]

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Paper 3 structured question: Exothermic and endothermic reactions

Paper 3Theory (Core)1 marks

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Endothermic Reaction Characteristics

Endothermic reactions are characterized by the absorption of heat, leading to a drop in temperature.

  1. a

    Define an endothermic reaction.

    Aim for approximately 1 distinct marking point.

    [1]