Study Hub

Study Guides

This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.

Back to Study HubBrowse Year 11 Science Guides

Year 11 - Science

Combustion of alcohols: practical

Organic chemistry

Unit Summary

This unit covers identifying functional groups, naming and drawing structural formulae, and predicting reactions of alkanes, alkenes, alcohols, and carboxylic acids. It explains addition and condensation polymerisation and discusses natural polymers like DNA, sugars, and amino acids.

Lesson Summary

You will learn to analyse calorimetry data to determine which alcohol releases the most energy when combusted.

Key Notes

  • Calorimetry can be used to measure a reaction's energy change indirectly.
  • Calorimetry data can be used to calculate the mass of alcohol needed to cause a 1°C rise in temperature of the water.
  • An alcohol that causes a 1°C temperature rise when the least amount is combusted is releasing the most energy.
  • The energy change of combustion for a variety of alcohols can be compared to the molecular formula of each alcohol.

Vocabulary To Learn

  • alcohols: Alcohols are a homologous series that contain the -OH functional group.
  • combustion: Combustion is an exothermic reaction where a substance reacts with oxygen.
  • calorimetry: Calorimetry is an experiment that can be used to measure the energy released from a fuel such as alcohol.
  • independent variable: The independent variable is the single variant that is changed in an investigation.

Common Mistakes To Avoid

  • Forgetting to measure the initial mass of the burner and initial temperature of the water.

3 Quick Questions (With Answers)

1. Explain the scientific idea in this lesson using two key points.

Calorimetry can be used to measure a reaction's energy change indirectly. Calorimetry data can be used to calculate the mass of alcohol needed to cause a 1°C rise in temperature of the water.

2. Define this scientific word and use it in context. 'alcohols'

Alcohols are a homologous series that contain the -OH functional group. Include the word in a full scientific explanation, not as a single label.

3. Correct this common scientific misunderstanding.

Mistake: Forgetting to measure the initial mass of the burner and initial temperature of the water. Correction: Emphasise the importance in remembering to measure this data when writing a method for this practical.

More Lessons In This Unit

Browse all guides in the Year 11 Science guide library.