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Choosing the right gas method

Choosing the right gas method

Flowchart for choosing between gas volume ratios, molar gas volume at RTP, and pV = nRT with key unit conversions labelled

Gas questions always begin with a balanced equation, but the route depends on the conditions. The three key routes are direct gas volume ratios, molar gas volume at RTP, and the full ideal gas equation.

Gas volumes and ideal gas Lesson

  1. A Level
  2. /Chemistry
  3. /Gas volumes and ideal gas

Step-by-step lessons on Edexcel A Level Chemistry Gas volumes and ideal gas. Each one builds up to exam-style questions. Build confidence with atomic structure, bonding and moles calculations early on, since these underpin the more demanding organic mechanisms, equilibrium and practical-analysis topics that dominate Year 2.

Lessons