1.5 Ideal gases

Objective notes

4 learning objectives

1.5.1Ideal gas model assumptions

• Moving particles, negligible volume, no intermolecular forces

• Elastic collisions

1.5.2Real gases

• Deviate from ideal at low temperature and high pressure

1.5.3Molar volume

• Constant at specific T and P

• Analyse temperature, pressure, and volume graphs for a fixed mass of gas

1.5.4Ideal gas equation

• PV = nRT

• Combined gas law: P₁V₁/T₁ = P₂V₂/T₂

• Solve ideal gas problems with correct pressure, volume, and temperature units