sciencegcse← Chemistry extras

Separate Chemistry · Paper 1 · Higher Tier only

Gas volumes at room temperature

Key ideas1 of 4

One mole, 24 dm³

At room temperature and pressure (20°C and 1 atmosphere), one mole of any gas occupies 24 dm³. Equal moles occupy equal volumes when temperature and pressure are the same.

At room temperature and pressure, 1 mole of gas occupies 24 cubic decimetres and half a mole occupies 12 cubic decimetres.

Next: Titration concentrations →
Practice, downloads and sources

Daily 5 · Exam practice · Revision sheet ↓

Higher Tier only. Use alongside the shared C1–C5 lessons.

AQA GCSE Chemistry 8462 · 4.3.3–4.3.5. Original teaching notes, questions and diagrams.