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ZIMSEC O-Level Chemistry

Endothermic and exothermic reactions

Endothermic and exothermic reactions in ZIMSEC O-Level Chemistry: what the syllabus expects you to know, the learning objectives and how to practise.
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Overview

Form 3 (competency matrix 8.8.1).

Learning objectives

What the syllabus expects you to be able to do.

  1. 7.1.9.1Describe endothermic and exothermic reactions in terms of bond breaking and bond forming.
  2. 7.1.9.2Distinguish between endothermic and exothermic reactions, for example burning fuels, neutralisation and dissolving ammonium nitrate.

Lessons

  • Exothermic and endothermic reactions

    25 min

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Sample question

A sample question on this topic. Answer it, check it, then read the worked answer.

Endothermic and exothermic reactions: sample question

1 mark

True or false: when ammonium nitrate dissolves in water, the temperature of the water falls, so the process is endothermic.

Is the statement true or false?

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