This topic summary covers Topic Summary: Gas Volumes within Gas Volume for GCSE Chemistry. Topic 19: Gas Volume It is section 11 of 11 in this topic. Use this topic summary to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 11 of 11
Practice
20 questions
Recall
20 flashcards
Topic Summary: Gas Volumes
Key Terms
- RTP: 20°C and 1 atmosphere pressure
- Molar gas volume: 24 dm³/mol at RTP
- Volume = n × 24 (dm³)
- Moles = V ÷ 24
- 1 dm³ = 1000 cm³
Must-Know Facts
- All gases: 24 dm³/mol at RTP
- Particle size does not affect molar volume
- Multi-step route: mass → moles → ratio → volume
- Use 24 (not 22.4) for GCSE calculations
- Always convert cm³ ÷ 1000 to get dm³ first