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Cambridge IGCSE Chemistry practice

Paper 3 structured question: Exothermic and endothermic reactions

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Exothermic and endothermic reactions

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Paper 3Theory (Core)1 marks

Understanding exothermic reactions in chemistry.

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Exothermic Reaction Description

An exothermic reaction occurs when reactants release energy in the form of heat to the surroundings, causing the temperature of the surroundings to rise.

  1. a

    State the effect of an exothermic reaction on the temperature of the surroundings.

    Aim for approximately 1 distinct marking point.

    [1]

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Paper 3 structured question: Exothermic and endothermic reactions

Paper 3Theory (Core)2 marks

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Characteristics of Exothermic Reactions

Exothermic reactions are characterized by the release of thermal energy, leading to an increase in the temperature of the surroundings. Examples include combustion and respiration.

  1. a

    State two examples of exothermic reactions.

    Aim for approximately 2 distinct marking points.

    [2]