Chemical energetics

Use G3 Science Chemistry temperature evidence to identify exothermic and endothermic changes and explain energy transfer between system and surroundings.

SEC G3 Combined Science Chemistry component 2027

Start topic

Before you begin

Use G3 Science Chemistry temperature evidence to identify exothermic and endothermic changes and explain energy transfer between system and surroundings.

Learning goals

Describe an exothermic process as one that transfers energy, often as heat, to the surroundings, so the temperature rises
Describe an endothermic process as one that takes in energy, often as heat, from the surroundings, so the temperature falls

Syllabus statements covered

describe the term exothermic as a process or chemical reaction which transfers energy, often in the form of heat, to the surroundings and may be detected by an increase in temperature, e.g. the reaction between sodium hydroxide and hydrochloric acid
describe the term endothermic as a process or chemical reaction which takes in energy, often in the form of heat, from the surroundings and may be detected by a decrease in temperature, e.g. the dissolving of ammonium nitrate in water.

In this topic

Exothermic and endothermic changes

Classify changes as exothermic or endothermic from temperature rises and falls, and plan a fair temperature investigation.

Practise and check

Or choose